move enable_opencsg_shaders, fix indenting, split out display_opencsg_warning

also update docs, and try to make enable_opencsg_shaders the same between
qgl and offscreengl

9 files changed, 784 insertions, 769 deletions

diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 00e752e..30d8b07 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -15,7 +15,7 @@ o We didn't always print a warning when CSG normalization created too many eleme
 o Binary STLs can now be read on big endian architectures
 o Some binary STLs couldn't be read
 o Fixed some issues related to ARM builds
-o Improved regression dumptest multmatrix output portability
+o Changed multmatrix floating-point output to improve dumptest portability
 o Regression test auto-starts & stops Xvfb / Xvnc if on headless unix machine
 o CGAL triangulation more lenient- enables partial rendering of 'bad' DXF data
 
diff --git a/openscad.pro b/openscad.pro
index 7858a80..3947c65 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -289,8 +289,8 @@ SOURCES += src/version_check.cc \
            src/Preferences.cc \
            src/OpenCSGWarningDialog.cc \
            src/editor.cc \
-           src/qglview.cc \
            src/GLView.cc \
+           src/QGLview.cc \
            src/AutoUpdater.cc \
            \
            src/builtin.cc \
diff --git a/src/GLView.h b/src/GLView.h
index f7ae5a7..041c4a5 100644
--- a/src/GLView.h
+++ b/src/GLView.h
@@ -65,6 +65,7 @@ public:
   bool is_opencsg_capable;
   bool has_shaders;
 //  void enable_opencsg_shaders();
+	virtual void display_opencsg_warning() = 0;
   bool opencsg_support;
   int opencsg_id;
 #endif
diff --git a/src/OffscreenView.cc b/src/OffscreenView.cc
index aa8570e..1a5949a 100644
--- a/src/OffscreenView.cc
+++ b/src/OffscreenView.cc
@@ -16,25 +16,30 @@
 
 OffscreenView::OffscreenView(size_t width, size_t height)
 {
-	object_rot << 35, 0, 25;
-	this->ctx = create_offscreen_context(width, height);
-	if ( this->ctx == NULL ) throw -1;
-	initializeGL();
-	GLView::resizeGL(width, height);
+  object_rot << 35, 0, 25;
+  this->ctx = create_offscreen_context(width, height);
+  if ( this->ctx == NULL ) throw -1;
+  initializeGL();
+  GLView::resizeGL(width, height);
 }
 
 OffscreenView::~OffscreenView()
 {
-	teardown_offscreen_context(this->ctx);
+  teardown_offscreen_context(this->ctx);
+}
+
+#ifdef ENABLE_OPENCSG
+void OffscreenView::display_opencsg_warning()
+{
+    fprintf(stderr, "OpenSCAD recommended OpenGL version is 2.0. \n");
 }
 
 void OffscreenView::enable_opencsg_shaders()
 {
-#ifdef ENABLE_OPENCSG
-	const char *openscad_disable_gl20_env = getenv("OPENSCAD_DISABLE_GL20");
-	if (openscad_disable_gl20_env && !strcmp(openscad_disable_gl20_env, "0")) {
-		openscad_disable_gl20_env = NULL;
-	}
+  const char *openscad_disable_gl20_env = getenv("OPENSCAD_DISABLE_GL20");
+  if (openscad_disable_gl20_env && !strcmp(openscad_disable_gl20_env, "0")) {
+    openscad_disable_gl20_env = NULL;
+  }
 
   // All OpenGL 2 contexts are OpenCSG capable
   if (GLEW_VERSION_2_0) {
@@ -58,7 +63,7 @@ void OffscreenView::enable_opencsg_shaders()
   }
 
   if (!GLEW_VERSION_2_0 || !this->is_opencsg_capable) {
-		fprintf(stderr, "OpenSCAD recommended OpenGL version is 2.0. \n");
+    display_opencsg_warning();
   }
 
   if (opencsg_support && this->has_shaders) {
@@ -84,201 +89,202 @@ void OffscreenView::enable_opencsg_shaders()
       tr
       shading
    */
-		const char *vs_source =
-			"uniform float xscale, yscale;\n"
-			"attribute vec3 pos_b, pos_c;\n"
-			"attribute vec3 trig, mask;\n"
-			"varying vec3 tp, tr;\n"
-			"varying float shading;\n"
-			"void main() {\n"
-			"  vec4 p0 = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-			"  vec4 p1 = gl_ModelViewProjectionMatrix * vec4(pos_b, 1.0);\n"
-			"  vec4 p2 = gl_ModelViewProjectionMatrix * vec4(pos_c, 1.0);\n"
-			"  float a = distance(vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
-			"  float b = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w));\n"
-			"  float c = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
-			"  float s = (a + b + c) / 2.0;\n"
-			"  float A = sqrt(s*(s-a)*(s-b)*(s-c));\n"
-			"  float ha = 2.0*A/a;\n"
-			"  gl_Position = p0;\n"
-			"  tp = mask * ha;\n"
-			"  tr = trig;\n"
-			"  vec3 normal, lightDir;\n"
-			"  normal = normalize(gl_NormalMatrix * gl_Normal);\n"
-			"  lightDir = normalize(vec3(gl_LightSource[0].position));\n"
-			"  shading = abs(dot(normal, lightDir));\n"
-			"}\n";
+    const char *vs_source =
+      "uniform float xscale, yscale;\n"
+      "attribute vec3 pos_b, pos_c;\n"
+      "attribute vec3 trig, mask;\n"
+      "varying vec3 tp, tr;\n"
+      "varying float shading;\n"
+      "void main() {\n"
+      "  vec4 p0 = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+      "  vec4 p1 = gl_ModelViewProjectionMatrix * vec4(pos_b, 1.0);\n"
+      "  vec4 p2 = gl_ModelViewProjectionMatrix * vec4(pos_c, 1.0);\n"
+      "  float a = distance(vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
+      "  float b = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w));\n"
+      "  float c = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
+      "  float s = (a + b + c) / 2.0;\n"
+      "  float A = sqrt(s*(s-a)*(s-b)*(s-c));\n"
+      "  float ha = 2.0*A/a;\n"
+      "  gl_Position = p0;\n"
+      "  tp = mask * ha;\n"
+      "  tr = trig;\n"
+      "  vec3 normal, lightDir;\n"
+      "  normal = normalize(gl_NormalMatrix * gl_Normal);\n"
+      "  lightDir = normalize(vec3(gl_LightSource[0].position));\n"
+      "  shading = abs(dot(normal, lightDir));\n"
+      "}\n";
 
     /*
       Inputs:
         tp && tr - if any components of tp < tr, use color2 (edge color)
         shading  - multiplied by color1. color2 is is without lighting
-     */
-		const char *fs_source =
-			"uniform vec4 color1, color2;\n"
-			"varying vec3 tp, tr, tmp;\n"
-			"varying float shading;\n"
-			"void main() {\n"
-			"  gl_FragColor = vec4(color1.r * shading, color1.g * shading, color1.b * shading, color1.a);\n"
-			"  if (tp.x < tr.x || tp.y < tr.y || tp.z < tr.z)\n"
-			"    gl_FragColor = color2;\n"
-			"}\n";
-
-		GLuint vs = glCreateShader(GL_VERTEX_SHADER);
-		glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL);
-		glCompileShader(vs);
-
-		GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
-		glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL);
-		glCompileShader(fs);
-
-		GLuint edgeshader_prog = glCreateProgram();
-		glAttachShader(edgeshader_prog, vs);
-		glAttachShader(edgeshader_prog, fs);
-		glLinkProgram(edgeshader_prog);
-
-		shaderinfo[0] = edgeshader_prog;
-		shaderinfo[1] = glGetUniformLocation(edgeshader_prog, "color1");
-		shaderinfo[2] = glGetUniformLocation(edgeshader_prog, "color2");
-		shaderinfo[3] = glGetAttribLocation(edgeshader_prog, "trig");
-		shaderinfo[4] = glGetAttribLocation(edgeshader_prog, "pos_b");
-		shaderinfo[5] = glGetAttribLocation(edgeshader_prog, "pos_c");
-		shaderinfo[6] = glGetAttribLocation(edgeshader_prog, "mask");
-		shaderinfo[7] = glGetUniformLocation(edgeshader_prog, "xscale");
-		shaderinfo[8] = glGetUniformLocation(edgeshader_prog, "yscale");
-
-		GLenum err = glGetError();
-		if (err != GL_NO_ERROR) {
-			fprintf(stderr, "OpenGL Error: %s\n", gluErrorString(err));
-		}
-
-		GLint status;
-		glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status);
-		if (status == GL_FALSE) {
-			int loglen;
-			char logbuffer[1000];
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer);
-		} else {
-			int loglen;
-			char logbuffer[1000];
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			if (loglen > 0) {
-				fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer);
-			}
-			glValidateProgram(edgeshader_prog);
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			if (loglen > 0) {
-				fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer);
-			}
-		}
-	}
-#endif
+		*/
+    const char *fs_source =
+      "uniform vec4 color1, color2;\n"
+      "varying vec3 tp, tr, tmp;\n"
+      "varying float shading;\n"
+      "void main() {\n"
+      "  gl_FragColor = vec4(color1.r * shading, color1.g * shading, color1.b * shading, color1.a);\n"
+      "  if (tp.x < tr.x || tp.y < tr.y || tp.z < tr.z)\n"
+      "    gl_FragColor = color2;\n"
+      "}\n";
+
+    GLuint vs = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL);
+    glCompileShader(vs);
+
+    GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL);
+    glCompileShader(fs);
+
+    GLuint edgeshader_prog = glCreateProgram();
+    glAttachShader(edgeshader_prog, vs);
+    glAttachShader(edgeshader_prog, fs);
+    glLinkProgram(edgeshader_prog);
+
+    shaderinfo[0] = edgeshader_prog;
+    shaderinfo[1] = glGetUniformLocation(edgeshader_prog, "color1");
+    shaderinfo[2] = glGetUniformLocation(edgeshader_prog, "color2");
+    shaderinfo[3] = glGetAttribLocation(edgeshader_prog, "trig");
+    shaderinfo[4] = glGetAttribLocation(edgeshader_prog, "pos_b");
+    shaderinfo[5] = glGetAttribLocation(edgeshader_prog, "pos_c");
+    shaderinfo[6] = glGetAttribLocation(edgeshader_prog, "mask");
+    shaderinfo[7] = glGetUniformLocation(edgeshader_prog, "xscale");
+    shaderinfo[8] = glGetUniformLocation(edgeshader_prog, "yscale");
+
+    GLenum err = glGetError();
+    if (err != GL_NO_ERROR) {
+      fprintf(stderr, "OpenGL Error: %s\n", gluErrorString(err));
+    }
+
+    GLint status;
+    glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status);
+    if (status == GL_FALSE) {
+      int loglen;
+      char logbuffer[1000];
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer);
+    } else {
+      int loglen;
+      char logbuffer[1000];
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      if (loglen > 0) {
+        fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer);
+      }
+      glValidateProgram(edgeshader_prog);
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      if (loglen > 0) {
+        fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer);
+      }
+    }
+  }
 }
+#endif
 
 void OffscreenView::initializeGL()
 {
-	glEnable(GL_DEPTH_TEST);
-	glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY);
-
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-	GLfloat light_diffuse[] = {1.0, 1.0, 1.0, 1.0};
-	GLfloat light_position0[] = {-1.0, -1.0, +1.0, 0.0};
-	GLfloat light_position1[] = {+1.0, +1.0, -1.0, 0.0};
-
-	glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
-	glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
-	glEnable(GL_LIGHT0);
-	glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
-	glLightfv(GL_LIGHT1, GL_POSITION, light_position1);
-	glEnable(GL_LIGHT1);
-	glEnable(GL_LIGHTING);
-	glEnable(GL_NORMALIZE);
-
-	glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
-	glEnable(GL_COLOR_MATERIAL);
-
-
+  glEnable(GL_DEPTH_TEST);
+  glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY);
+
+  glEnable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+  GLfloat light_diffuse[] = {1.0, 1.0, 1.0, 1.0};
+  GLfloat light_position0[] = {-1.0, -1.0, +1.0, 0.0};
+  GLfloat light_position1[] = {+1.0, +1.0, -1.0, 0.0};
+
+  glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+  glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
+  glEnable(GL_LIGHT0);
+  glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
+  glLightfv(GL_LIGHT1, GL_POSITION, light_position1);
+  glEnable(GL_LIGHT1);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_NORMALIZE);
+
+  glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
+  glEnable(GL_COLOR_MATERIAL);
+#ifdef ENABLE_OPENCSG
+	enable_opencsg_shaders();
+#endif
 }
 
 void OffscreenView::paintGL()
 {
-	glEnable(GL_LIGHTING);
+  glEnable(GL_LIGHTING);
 
-	if (orthomode) setupOrtho();
-	else setupPerspective();
+  if (orthomode) setupOrtho();
+  else setupPerspective();
 
-	glMatrixMode(GL_MODELVIEW);
-	glLoadIdentity();
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
 
-	glClearColor(1.0f, 1.0f, 0.92f, 1.0f);
+  glClearColor(1.0f, 1.0f, 0.92f, 1.0f);
 
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 
-	gluLookAt(this->camera_eye[0], this->camera_eye[1], this->camera_eye[2],
-						this->camera_center[0], this->camera_center[1], this->camera_center[2], 
-						0.0, 0.0, 1.0);
+  gluLookAt(this->camera_eye[0], this->camera_eye[1], this->camera_eye[2],
+            this->camera_center[0], this->camera_center[1], this->camera_center[2], 
+            0.0, 0.0, 1.0);
 
-	// glRotated(object_rot[0], 1.0, 0.0, 0.0);
-	// glRotated(object_rot[1], 0.0, 1.0, 0.0);
-	// glRotated(object_rot[2], 0.0, 0.0, 1.0);
+  // glRotated(object_rot[0], 1.0, 0.0, 0.0);
+  // glRotated(object_rot[1], 0.0, 1.0, 0.0);
+  // glRotated(object_rot[2], 0.0, 0.0, 1.0);
 
-	// Large gray axis cross inline with the model
+  // Large gray axis cross inline with the model
   // FIXME: This is always gray - adjust color to keep contrast with background
-	if (showaxes)
-	{
-		glLineWidth(1);
-		glColor3d(0.5, 0.5, 0.5);
-		glBegin(GL_LINES);
-		double l = 3*(this->camera_center - this->camera_eye).norm();
-		glVertex3d(-l, 0, 0);
-		glVertex3d(+l, 0, 0);
-		glVertex3d(0, -l, 0);
-		glVertex3d(0, +l, 0);
-		glVertex3d(0, 0, -l);
-		glVertex3d(0, 0, +l);
-		glEnd();
-	}
-
-	glDepthFunc(GL_LESS);
-	glCullFace(GL_BACK);
-	glDisable(GL_CULL_FACE);
-
-	glLineWidth(2);
-	glColor3d(1.0, 0.0, 0.0);
-
-	if (this->renderer) {
-		this->renderer->draw(showfaces, showedges);
-	}
+  if (showaxes)
+  {
+    glLineWidth(1);
+    glColor3d(0.5, 0.5, 0.5);
+    glBegin(GL_LINES);
+    double l = 3*(this->camera_center - this->camera_eye).norm();
+    glVertex3d(-l, 0, 0);
+    glVertex3d(+l, 0, 0);
+    glVertex3d(0, -l, 0);
+    glVertex3d(0, +l, 0);
+    glVertex3d(0, 0, -l);
+    glVertex3d(0, 0, +l);
+    glEnd();
+  }
+
+  glDepthFunc(GL_LESS);
+  glCullFace(GL_BACK);
+  glDisable(GL_CULL_FACE);
+
+  glLineWidth(2);
+  glColor3d(1.0, 0.0, 0.0);
+
+  if (this->renderer) {
+    this->renderer->draw(showfaces, showedges);
+  }
 }
 
 bool OffscreenView::save(const char *filename)
 {
-	return save_framebuffer(this->ctx, filename);
+  return save_framebuffer(this->ctx, filename);
 }
 
 bool OffscreenView::save(std::ostream &output)
 {
-	return save_framebuffer(this->ctx, output);
+  return save_framebuffer(this->ctx, output);
 }
 
 std::string OffscreenView::getRendererInfo() const
 {
-	std::stringstream out;
+  std::stringstream out;
 
-	out << glew_dump()
-	    << offscreen_context_getinfo(this->ctx);
+  out << glew_dump()
+      << offscreen_context_getinfo(this->ctx);
 
-	return out.str();
+  return out.str();
 }
 
 /*
 void OffscreenView::setCamera(const Eigen::Vector3d &pos, const Eigen::Vector3d &center)
 {
-	this->camera_eye = pos;
-	this->camera_center = center;
+  this->camera_eye = pos;
+  this->camera_center = center;
 }
 
 */
diff --git a/src/OffscreenView.h b/src/OffscreenView.h
index 81fa88d..fd7c9bd 100644
--- a/src/OffscreenView.h
+++ b/src/OffscreenView.h
@@ -17,15 +17,17 @@ class OffscreenView : public GLView
 public:
 	OffscreenView(size_t width, size_t height); // not
 	~OffscreenView(); // not
-	void enable_opencsg_shaders();
 	void initializeGL(); //
 	void paintGL(); //
 	bool save(std::ostream &output);
 	OffscreenContext *ctx; // not
-
 	// overrides
 	bool save(const char *filename);
   std::string getRendererInfo() const;
+#ifdef ENABLE_OPENCSG
+	void enable_opencsg_shaders();
+	void display_opencsg_warning();
+#endif
 };
 
 #endif
diff --git a/src/QGLView.cc b/src/QGLView.cc
new file mode 100644
index 0000000..f1a0250
--- /dev/null
+++ b/src/QGLView.cc
@@ -0,0 +1,600 @@
+/*
+ *  OpenSCAD (www.openscad.org)
+ *  Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
+ *                          Marius Kintel <marius@kintel.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  As a special exception, you have permission to link this program
+ *  with the CGAL library and distribute executables, as long as you
+ *  follow the requirements of the GNU GPL in regard to all of the
+ *  software in the executable aside from CGAL.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include "QGLView.h"
+#include "Preferences.h"
+#include "renderer.h"
+#include "rendersettings.h"
+#include "linalg.h"
+
+#include <QApplication>
+#include <QWheelEvent>
+#include <QCheckBox>
+#include <QDialogButtonBox>
+#include <QMouseEvent>
+#include <QMessageBox>
+#include <QPushButton>
+#include <QSettings>
+#include <QTimer>
+#include <QTextEdit>
+#include <QVBoxLayout>
+#include <QErrorMessage>
+#include "OpenCSGWarningDialog.h"
+
+#include "mathc99.h"
+#include <stdio.h>
+
+#ifdef ENABLE_OPENCSG
+#  include <opencsg.h>
+#endif
+
+#ifdef _WIN32
+#include <GL/wglew.h>
+#elif !defined(__APPLE__)
+#include <GL/glxew.h>
+#endif
+
+QGLView::QGLView(QWidget *parent) : QGLWidget(parent)
+{
+  init();
+}
+
+QGLView::QGLView(const QGLFormat & format, QWidget *parent) : QGLWidget(format, parent)
+{
+  init();
+}
+
+static bool running_under_wine = false;
+
+void QGLView::init()
+{
+  this->object_rot << 35, 0, -25;
+
+  this->mouse_drag_active = false;
+  this->statusLabel = NULL;
+
+  setMouseTracking(true);
+
+// see paintGL() + issue160 + wine FAQ
+#ifdef _WIN32
+#include <windows.h>
+  HMODULE hntdll = GetModuleHandle(L"ntdll.dll");
+  if (hntdll)
+    if ( (void *)GetProcAddress(hntdll, "wine_get_version") )
+      running_under_wine = true;
+#endif
+}
+
+#ifdef ENABLE_OPENCSG
+void QGLView::enable_opencsg_shaders()
+{
+  const char *openscad_disable_gl20_env = getenv("OPENSCAD_DISABLE_GL20");
+  if (openscad_disable_gl20_env && !strcmp(openscad_disable_gl20_env, "0")) {
+    openscad_disable_gl20_env = NULL;
+  }
+
+  // All OpenGL 2 contexts are OpenCSG capable
+  if (GLEW_VERSION_2_0) {
+    if (!openscad_disable_gl20_env) {
+      this->is_opencsg_capable = true;
+      this->has_shaders = true;
+    }
+  }
+  // If OpenGL < 2, check for extensions
+  else {
+    if (GLEW_ARB_framebuffer_object) this->is_opencsg_capable = true;
+    else if (GLEW_EXT_framebuffer_object && GLEW_EXT_packed_depth_stencil) {
+      this->is_opencsg_capable = true;
+    }
+#ifdef WIN32
+    else if (WGLEW_ARB_pbuffer && WGLEW_ARB_pixel_format) this->is_opencsg_capable = true;
+#elif !defined(__APPLE__)
+    else if (GLXEW_SGIX_pbuffer && GLXEW_SGIX_fbconfig) this->is_opencsg_capable = true;
+#endif
+  }
+
+  if (!GLEW_VERSION_2_0 || !this->is_opencsg_capable) {
+		display_opencsg_warning();
+  }
+  if (opencsg_support && this->has_shaders) {
+  /*
+    Uniforms:
+      1 color1 - face color
+      2 color2 - edge color
+      7 xscale
+      8 yscale
+
+    Attributes:
+      3 trig
+      4 pos_b
+      5 pos_c
+      6 mask
+
+    Other:
+      9 width
+      10 height
+
+    Outputs:
+      tp
+      tr
+      shading
+   */
+    const char *vs_source =
+      "uniform float xscale, yscale;\n"
+      "attribute vec3 pos_b, pos_c;\n"
+      "attribute vec3 trig, mask;\n"
+      "varying vec3 tp, tr;\n"
+      "varying float shading;\n"
+      "void main() {\n"
+      "  vec4 p0 = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+      "  vec4 p1 = gl_ModelViewProjectionMatrix * vec4(pos_b, 1.0);\n"
+      "  vec4 p2 = gl_ModelViewProjectionMatrix * vec4(pos_c, 1.0);\n"
+      "  float a = distance(vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
+      "  float b = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w));\n"
+      "  float c = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
+      "  float s = (a + b + c) / 2.0;\n"
+      "  float A = sqrt(s*(s-a)*(s-b)*(s-c));\n"
+      "  float ha = 2.0*A/a;\n"
+      "  gl_Position = p0;\n"
+      "  tp = mask * ha;\n"
+      "  tr = trig;\n"
+      "  vec3 normal, lightDir;\n"
+      "  normal = normalize(gl_NormalMatrix * gl_Normal);\n"
+      "  lightDir = normalize(vec3(gl_LightSource[0].position));\n"
+      "  shading = abs(dot(normal, lightDir));\n"
+      "}\n";
+
+    /*
+      Inputs:
+        tp && tr - if any components of tp < tr, use color2 (edge color)
+        shading  - multiplied by color1. color2 is is without lighting
+		*/
+    const char *fs_source =
+      "uniform vec4 color1, color2;\n"
+      "varying vec3 tp, tr, tmp;\n"
+      "varying float shading;\n"
+      "void main() {\n"
+      "  gl_FragColor = vec4(color1.r * shading, color1.g * shading, color1.b * shading, color1.a);\n"
+      "  if (tp.x < tr.x || tp.y < tr.y || tp.z < tr.z)\n"
+      "    gl_FragColor = color2;\n"
+      "}\n";
+
+    GLuint vs = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL);
+    glCompileShader(vs);
+
+    GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL);
+    glCompileShader(fs);
+
+    GLuint edgeshader_prog = glCreateProgram();
+    glAttachShader(edgeshader_prog, vs);
+    glAttachShader(edgeshader_prog, fs);
+    glLinkProgram(edgeshader_prog);
+
+    shaderinfo[0] = edgeshader_prog;
+    shaderinfo[1] = glGetUniformLocation(edgeshader_prog, "color1");
+    shaderinfo[2] = glGetUniformLocation(edgeshader_prog, "color2");
+    shaderinfo[3] = glGetAttribLocation(edgeshader_prog, "trig");
+    shaderinfo[4] = glGetAttribLocation(edgeshader_prog, "pos_b");
+    shaderinfo[5] = glGetAttribLocation(edgeshader_prog, "pos_c");
+    shaderinfo[6] = glGetAttribLocation(edgeshader_prog, "mask");
+    shaderinfo[7] = glGetUniformLocation(edgeshader_prog, "xscale");
+    shaderinfo[8] = glGetUniformLocation(edgeshader_prog, "yscale");
+
+    GLenum err = glGetError();
+    if (err != GL_NO_ERROR) {
+      fprintf(stderr, "OpenGL Error: %s\n", gluErrorString(err));
+    }
+
+    GLint status;
+    glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status);
+    if (status == GL_FALSE) {
+      int loglen;
+      char logbuffer[1000];
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer);
+    } else {
+      int loglen;
+      char logbuffer[1000];
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      if (loglen > 0) {
+        fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer);
+      }
+      glValidateProgram(edgeshader_prog);
+      glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
+      if (loglen > 0) {
+        fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer);
+      }
+    }
+  }
+}
+#endif
+
+void QGLView::initializeGL()
+{
+  glEnable(GL_DEPTH_TEST);
+  glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY);
+
+  glEnable(GL_BLEND);
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+  GLfloat light_diffuse[] = {1.0, 1.0, 1.0, 1.0};
+  GLfloat light_position0[] = {-1.0, -1.0, +1.0, 0.0};
+  GLfloat light_position1[] = {+1.0, +1.0, -1.0, 0.0};
+
+  glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+  glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
+  glEnable(GL_LIGHT0);
+  glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
+  glLightfv(GL_LIGHT1, GL_POSITION, light_position1);
+  glEnable(GL_LIGHT1);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_NORMALIZE);
+
+  glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
+  glEnable(GL_COLOR_MATERIAL);
+
+  GLenum err = glewInit();
+  if (GLEW_OK != err) {
+    fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
+  }
+  enable_opencsg_shaders();
+}
+
+std::string QGLView::getRendererInfo() const
+{
+  std::string glewinfo = glew_dump();
+  std::string glextlist = glew_extensions_dump();
+  return glewinfo + std::string("\nUsing QGLWidget\n\n") + glextlist;
+}
+
+#ifdef ENABLE_OPENCSG
+void QGLView::display_opencsg_warning()
+{
+    if (Preferences::inst()->getValue("advanced/opencsg_show_warning").toBool()) {
+      QTimer::singleShot(0, this, SLOT(display_opencsg_warning_dialog()));
+    }
+}
+
+void QGLView::display_opencsg_warning_dialog()
+{
+  OpenCSGWarningDialog *dialog = new OpenCSGWarningDialog(this);
+
+  QString message;
+  if (this->is_opencsg_capable) {
+    message += "Warning: You may experience OpenCSG rendering errors.\n\n";
+  }
+  else {
+    message += "Warning: Missing OpenGL capabilities for OpenCSG - OpenCSG has been disabled.\n\n";
+    dialog->enableOpenCSGBox->hide();
+  }
+  message += "It is highly recommended to use OpenSCAD on a system with "
+    "OpenGL 2.0 or later.\n"
+    "Your renderer information is as follows:\n";
+  QString rendererinfo;
+  rendererinfo.sprintf("GLEW version %s\n"
+                       "%s (%s)\n"
+                       "OpenGL version %s\n",
+                       glewGetString(GLEW_VERSION),
+                       glGetString(GL_RENDERER), glGetString(GL_VENDOR),
+                       glGetString(GL_VERSION));
+  message += rendererinfo;
+
+  dialog->setText(message);
+  dialog->enableOpenCSGBox->setChecked(Preferences::inst()->getValue("advanced/enable_opencsg_opengl1x").toBool());
+  dialog->exec();
+
+  opencsg_support = this->is_opencsg_capable && Preferences::inst()->getValue("advanced/enable_opencsg_opengl1x").toBool();
+}
+#endif
+
+void QGLView::resizeGL(int w, int h)
+{
+  GLView::resizeGL(w,h);
+  GLView::setupGimbalPerspective();
+}
+
+void QGLView::paintGL()
+{
+  glEnable(GL_LIGHTING);
+
+  if (orthomode) GLView::setupGimbalOrtho(viewer_distance);
+  else GLView::setupGimbalPerspective();
+
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+
+  Color4f bgcol = RenderSettings::inst()->color(RenderSettings::BACKGROUND_COLOR);
+  glClearColor(bgcol[0], bgcol[1], bgcol[2], 0.0);
+
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+
+  glRotated(object_rot.x(), 1.0, 0.0, 0.0);
+  glRotated(object_rot.y(), 0.0, 1.0, 0.0);
+  glRotated(object_rot.z(), 0.0, 0.0, 1.0);
+
+  // FIXME: Crosshairs and axes are lighted, this doesn't make sense and causes them
+  // to change color based on view orientation.
+  if (showcrosshairs)
+  {
+    glLineWidth(3);
+    Color4f col = RenderSettings::inst()->color(RenderSettings::CROSSHAIR_COLOR);
+    glColor3f(col[0], col[1], col[2]);
+    glBegin(GL_LINES);
+    for (double xf = -1; xf <= +1; xf += 2)
+    for (double yf = -1; yf <= +1; yf += 2) {
+      double vd = viewer_distance/20;
+      glVertex3d(-xf*vd, -yf*vd, -vd);
+      glVertex3d(+xf*vd, +yf*vd, +vd);
+    }
+    glEnd();
+  }
+
+  glTranslated(object_trans.x(), object_trans.y(), object_trans.z());
+
+  // Large gray axis cross inline with the model
+  // FIXME: This is always gray - adjust color to keep contrast with background
+  if (showaxes)
+  {
+    glLineWidth(1);
+    glColor3d(0.5, 0.5, 0.5);
+    glBegin(GL_LINES);
+    double l = viewer_distance/10;
+    glVertex3d(-l, 0, 0);
+    glVertex3d(+l, 0, 0);
+    glVertex3d(0, -l, 0);
+    glVertex3d(0, +l, 0);
+    glVertex3d(0, 0, -l);
+    glVertex3d(0, 0, +l);
+    glEnd();
+  }
+
+  glDepthFunc(GL_LESS);
+  glCullFace(GL_BACK);
+  glDisable(GL_CULL_FACE);
+
+  glLineWidth(2);
+  glColor3d(1.0, 0.0, 0.0);
+
+  if (this->renderer) {
+#if defined(ENABLE_MDI) && defined(ENABLE_OPENCSG)
+    // FIXME: This belongs in the OpenCSG renderer, but it doesn't know about this ID yet
+    OpenCSG::setContext(this->opencsg_id);
+#endif
+    this->renderer->draw(showfaces, showedges);
+  }
+
+  // Small axis cross in the lower left corner
+  if (showaxes)
+  {
+    glDepthFunc(GL_ALWAYS);
+
+    GLView::setupGimbalOrtho(1000,true);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glRotated(object_rot.x(), 1.0, 0.0, 0.0);
+    glRotated(object_rot.y(), 0.0, 1.0, 0.0);
+    glRotated(object_rot.z(), 0.0, 0.0, 1.0);
+
+    glLineWidth(1);
+    glBegin(GL_LINES);
+    glColor3d(1.0, 0.0, 0.0);
+    glVertex3d(0, 0, 0); glVertex3d(10, 0, 0);
+    glColor3d(0.0, 1.0, 0.0);
+    glVertex3d(0, 0, 0); glVertex3d(0, 10, 0);
+    glColor3d(0.0, 0.0, 1.0);
+    glVertex3d(0, 0, 0); glVertex3d(0, 0, 10);
+    glEnd();
+
+    GLdouble mat_model[16];
+    glGetDoublev(GL_MODELVIEW_MATRIX, mat_model);
+
+    GLdouble mat_proj[16];
+    glGetDoublev(GL_PROJECTION_MATRIX, mat_proj);
+
+    GLint viewport[4];
+    glGetIntegerv(GL_VIEWPORT, viewport);
+
+    GLdouble xlabel_x, xlabel_y, xlabel_z;
+    gluProject(12, 0, 0, mat_model, mat_proj, viewport, &xlabel_x, &xlabel_y, &xlabel_z);
+    xlabel_x = round(xlabel_x); xlabel_y = round(xlabel_y);
+
+    GLdouble ylabel_x, ylabel_y, ylabel_z;
+    gluProject(0, 12, 0, mat_model, mat_proj, viewport, &ylabel_x, &ylabel_y, &ylabel_z);
+    ylabel_x = round(ylabel_x); ylabel_y = round(ylabel_y);
+
+    GLdouble zlabel_x, zlabel_y, zlabel_z;
+    gluProject(0, 0, 12, mat_model, mat_proj, viewport, &zlabel_x, &zlabel_y, &zlabel_z);
+    zlabel_x = round(zlabel_x); zlabel_y = round(zlabel_y);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glTranslated(-1, -1, 0);
+    glScaled(2.0/viewport[2], 2.0/viewport[3], 1);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+
+    // FIXME: This was an attempt to keep contrast with background, but is suboptimal
+    // (e.g. nearly invisible against a gray background).
+//    int r,g,b;
+//    r=g=b=0;
+//    bgcol.getRgb(&r, &g, &b);
+//    glColor3f((255.0f-r)/255.0f, (255.0f-g)/255.0f, (255.0f-b)/255.0f);
+    glColor3f(0.0f, 0.0f, 0.0f);
+    glBegin(GL_LINES);
+    // X Label
+    glVertex3d(xlabel_x-3, xlabel_y-3, 0); glVertex3d(xlabel_x+3, xlabel_y+3, 0);
+    glVertex3d(xlabel_x-3, xlabel_y+3, 0); glVertex3d(xlabel_x+3, xlabel_y-3, 0);
+    // Y Label
+    glVertex3d(ylabel_x-3, ylabel_y-3, 0); glVertex3d(ylabel_x+3, ylabel_y+3, 0);
+    glVertex3d(ylabel_x-3, ylabel_y+3, 0); glVertex3d(ylabel_x, ylabel_y, 0);
+    // Z Label
+    glVertex3d(zlabel_x-3, zlabel_y-3, 0); glVertex3d(zlabel_x+3, zlabel_y-3, 0);
+    glVertex3d(zlabel_x-3, zlabel_y+3, 0); glVertex3d(zlabel_x+3, zlabel_y+3, 0);
+    glVertex3d(zlabel_x-3, zlabel_y-3, 0); glVertex3d(zlabel_x+3, zlabel_y+3, 0);
+    glEnd();
+
+    //Restore perspective for next paint
+    if(!orthomode)
+      GLView::setupGimbalPerspective();
+  }
+
+  if (statusLabel) {
+    QString msg;
+    msg.sprintf("Viewport: translate = [ %.2f %.2f %.2f ], rotate = [ %.2f %.2f %.2f ], distance = %.2f",
+      -object_trans.x(), -object_trans.y(), -object_trans.z(),
+      fmodf(360 - object_rot.x() + 90, 360), fmodf(360 - object_rot.y(), 360), fmodf(360 - object_rot.z(), 360), viewer_distance);
+    statusLabel->setText(msg);
+  }
+
+  if (running_under_wine) swapBuffers();
+}
+
+void QGLView::keyPressEvent(QKeyEvent *event)
+{
+  if (event->key() == Qt::Key_Plus) {
+    viewer_distance *= 0.9;
+    updateGL();
+    return;
+  }
+  if (event->key() == Qt::Key_Minus) {
+    viewer_distance /= 0.9;
+    updateGL();
+    return;
+  }
+}
+
+void QGLView::wheelEvent(QWheelEvent *event)
+{
+  viewer_distance *= pow(0.9, event->delta() / 120.0);
+  updateGL();
+}
+
+void QGLView::mousePressEvent(QMouseEvent *event)
+{
+  mouse_drag_active = true;
+  last_mouse = event->globalPos();
+}
+
+void QGLView::normalizeAngle(GLdouble& angle)
+{
+  while(angle < 0)
+    angle += 360;
+  while(angle > 360)
+    angle -= 360;
+}
+
+void QGLView::mouseMoveEvent(QMouseEvent *event)
+{
+  QPoint this_mouse = event->globalPos();
+  double dx = (this_mouse.x()-last_mouse.x()) * 0.7;
+  double dy = (this_mouse.y()-last_mouse.y()) * 0.7;
+  if (mouse_drag_active) {
+    if (event->buttons() & Qt::LeftButton
+#ifdef Q_WS_MAC
+        && !(event->modifiers() & Qt::MetaModifier)
+#endif
+      ) {
+      // Left button rotates in xz, Shift-left rotates in xy
+      // On Mac, Ctrl-Left is handled as right button on other platforms
+      object_rot.x() += dy;
+      if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) != 0)
+        object_rot.y() += dx;
+      else
+        object_rot.z() += dx;
+
+      normalizeAngle(object_rot.x());
+      normalizeAngle(object_rot.y());
+      normalizeAngle(object_rot.z());
+    } else {
+      // Right button pans in the xz plane
+      // Middle button pans in the xy plane
+      // Shift-right and Shift-middle zooms
+      if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) != 0) {
+        viewer_distance += (GLdouble)dy;
+      } else {
+
+      double mx = +(dx) * viewer_distance/1000;
+      double mz = -(dy) * viewer_distance/1000;
+
+      double my = 0;
+#if (QT_VERSION < QT_VERSION_CHECK(4, 7, 0))
+      if (event->buttons() & Qt::MidButton) {
+#else
+      if (event->buttons() & Qt::MiddleButton) {
+#endif
+        my = mz;
+        mz = 0;
+        // actually lock the x-position
+        // (turns out to be easier to use than xy panning)
+        mx = 0;
+      }
+
+      Matrix3d aax, aay, aaz, tm3;
+      aax = Eigen::AngleAxisd(-(object_rot.x()/180) * M_PI, Vector3d::UnitX());
+      aay = Eigen::AngleAxisd(-(object_rot.y()/180) * M_PI, Vector3d::UnitY());
+      aaz = Eigen::AngleAxisd(-(object_rot.z()/180) * M_PI, Vector3d::UnitZ());
+      tm3 = Matrix3d::Identity();
+      tm3 = aaz * (aay * (aax * tm3));
+
+      Matrix4d tm;
+      tm = Matrix4d::Identity();
+      for (int i=0;i<3;i++) for (int j=0;j<3;j++) tm(j,i)=tm3(j,i);
+
+      Matrix4d vec;
+      vec <<
+        0,  0,  0,  mx,
+        0,  0,  0,  my,
+        0,  0,  0,  mz,
+        0,  0,  0,  1
+      ;
+      tm = tm * vec;
+      object_trans.x() += tm(0,3);
+      object_trans.y() += tm(1,3);
+      object_trans.z() += tm(2,3);
+      }
+    }
+    updateGL();
+    emit doAnimateUpdate();
+  }
+  last_mouse = this_mouse;
+}
+
+void QGLView::mouseReleaseEvent(QMouseEvent*)
+{
+  mouse_drag_active = false;
+  releaseMouse();
+}
+
+bool QGLView::save(const char *filename)
+{
+  QImage img = grabFrameBuffer();
+  return img.save(filename, "PNG");
+}
+
diff --git a/src/QGLView.h b/src/QGLView.h
index 5cb1872..da96b6a 100644
--- a/src/QGLView.h
+++ b/src/QGLView.h
@@ -38,7 +38,9 @@ public:
 	void setOrthoMode(bool enabled) { this->orthomode = enabled; }
 	std::string getRendererInfo() const;
 	bool save(const char *filename);
+#ifdef ENABLE_OPENCSG
 	void enable_opencsg_shaders();
+#endif
 
 public:
 	QLabel *statusLabel;
@@ -66,8 +68,9 @@ private:
 	void normalizeAngle(GLdouble& angle);
 
 #ifdef ENABLE_OPENCSG
-private slots:
 	void display_opencsg_warning();
+private slots:
+	void display_opencsg_warning_dialog();
 #endif
 
 signals:
diff --git a/src/qglview.cc b/src/qglview.cc
deleted file mode 100644
index 8e228e4..0000000
--- a/src/qglview.cc
+++ /dev/null
@@ -1,596 +0,0 @@
-/*
- *  OpenSCAD (www.openscad.org)
- *  Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
- *                          Marius Kintel <marius@kintel.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  As a special exception, you have permission to link this program
- *  with the CGAL library and distribute executables, as long as you
- *  follow the requirements of the GNU GPL in regard to all of the
- *  software in the executable aside from CGAL.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- */
-
-#include "QGLView.h"
-#include "Preferences.h"
-#include "renderer.h"
-#include "rendersettings.h"
-#include "linalg.h"
-
-#include <QApplication>
-#include <QWheelEvent>
-#include <QCheckBox>
-#include <QDialogButtonBox>
-#include <QMouseEvent>
-#include <QMessageBox>
-#include <QPushButton>
-#include <QSettings>
-#include <QTimer>
-#include <QTextEdit>
-#include <QVBoxLayout>
-#include <QErrorMessage>
-#include "OpenCSGWarningDialog.h"
-
-#include "mathc99.h"
-#include <stdio.h>
-
-#ifdef ENABLE_OPENCSG
-#  include <opencsg.h>
-#endif
-
-#ifdef _WIN32
-#include <GL/wglew.h>
-#elif !defined(__APPLE__)
-#include <GL/glxew.h>
-#endif
-
-QGLView::QGLView(QWidget *parent) : QGLWidget(parent)
-{
-	init();
-}
-
-QGLView::QGLView(const QGLFormat & format, QWidget *parent) : QGLWidget(format, parent)
-{
-	init();
-}
-
-static bool running_under_wine = false;
-
-void QGLView::init()
-{
-	this->object_rot << 35, 0, -25;
-
-	this->mouse_drag_active = false;
-	this->statusLabel = NULL;
-
-	setMouseTracking(true);
-
-// see paintGL() + issue160 + wine FAQ
-#ifdef _WIN32
-#include <windows.h>
-	HMODULE hntdll = GetModuleHandle(L"ntdll.dll");
-	if (hntdll)
-		if ( (void *)GetProcAddress(hntdll, "wine_get_version") )
-			running_under_wine = true;
-#endif
-}
-
-void QGLView::enable_opencsg_shaders()
-{
-#ifdef ENABLE_OPENCSG
-	GLenum err = glewInit();
-	if (GLEW_OK != err) {
-		fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
-	}
-
-	const char *openscad_disable_gl20_env = getenv("OPENSCAD_DISABLE_GL20");
-	if (openscad_disable_gl20_env && !strcmp(openscad_disable_gl20_env, "0")) {
-		openscad_disable_gl20_env = NULL;
-	}
-
-	// All OpenGL 2 contexts are OpenCSG capable
-	if (GLEW_VERSION_2_0) {
-		if (!openscad_disable_gl20_env) {
-			this->is_opencsg_capable = true;
-			this->has_shaders = true;
-		}
-	}
-	// If OpenGL < 2, check for extensions
-	else {
-		if (GLEW_ARB_framebuffer_object) this->is_opencsg_capable = true;
-		else if (GLEW_EXT_framebuffer_object && GLEW_EXT_packed_depth_stencil) {
-			this->is_opencsg_capable = true;
-		}
-#ifdef WIN32
-		else if (WGLEW_ARB_pbuffer && WGLEW_ARB_pixel_format) this->is_opencsg_capable = true;
-#elif !defined(__APPLE__)
-		else if (GLXEW_SGIX_pbuffer && GLXEW_SGIX_fbconfig) this->is_opencsg_capable = true;
-#endif
-	}
-
-	if (!GLEW_VERSION_2_0 || !this->is_opencsg_capable) {
-		if (Preferences::inst()->getValue("advanced/opencsg_show_warning").toBool()) {
-			QTimer::singleShot(0, this, SLOT(display_opencsg_warning()));
-		}
-	}
-	if (opencsg_support && this->has_shaders) {
-  /*
-		Uniforms:
-		  1 color1 - face color
-			2 color2 - edge color
-			7 xscale
-			8 yscale
-
-		Attributes:
-		  3 trig
-			4 pos_b
-			5 pos_c
-			6 mask
-
-		Other:
-		  9 width
-			10 height
-
-		Outputs:
-		  tp
-			tr
-			shading
-	 */
-		const char *vs_source =
-			"uniform float xscale, yscale;\n"
-			"attribute vec3 pos_b, pos_c;\n"
-			"attribute vec3 trig, mask;\n"
-			"varying vec3 tp, tr;\n"
-			"varying float shading;\n"
-			"void main() {\n"
-			"  vec4 p0 = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
-			"  vec4 p1 = gl_ModelViewProjectionMatrix * vec4(pos_b, 1.0);\n"
-			"  vec4 p2 = gl_ModelViewProjectionMatrix * vec4(pos_c, 1.0);\n"
-			"  float a = distance(vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
-			"  float b = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p1.x/p1.w, yscale*p1.y/p1.w));\n"
-			"  float c = distance(vec2(xscale*p0.x/p0.w, yscale*p0.y/p0.w), vec2(xscale*p2.x/p2.w, yscale*p2.y/p2.w));\n"
-			"  float s = (a + b + c) / 2.0;\n"
-			"  float A = sqrt(s*(s-a)*(s-b)*(s-c));\n"
-			"  float ha = 2.0*A/a;\n"
-			"  gl_Position = p0;\n"
-			"  tp = mask * ha;\n"
-			"  tr = trig;\n"
-			"  vec3 normal, lightDir;\n"
-			"  normal = normalize(gl_NormalMatrix * gl_Normal);\n"
-			"  lightDir = normalize(vec3(gl_LightSource[0].position));\n"
-			"  shading = abs(dot(normal, lightDir));\n"
-			"}\n";
-
-		/*
-			Inputs:
-			  tp && tr - if any components of tp < tr, use color2 (edge color)
-				shading  - multiplied by color1. color2 is is without lighting
-		 */
-		const char *fs_source =
-			"uniform vec4 color1, color2;\n"
-			"varying vec3 tp, tr, tmp;\n"
-			"varying float shading;\n"
-			"void main() {\n"
-			"  gl_FragColor = vec4(color1.r * shading, color1.g * shading, color1.b * shading, color1.a);\n"
-			"  if (tp.x < tr.x || tp.y < tr.y || tp.z < tr.z)\n"
-			"    gl_FragColor = color2;\n"
-			"}\n";
-
-		GLuint vs = glCreateShader(GL_VERTEX_SHADER);
-		glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL);
-		glCompileShader(vs);
-
-		GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
-		glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL);
-		glCompileShader(fs);
-
-		GLuint edgeshader_prog = glCreateProgram();
-		glAttachShader(edgeshader_prog, vs);
-		glAttachShader(edgeshader_prog, fs);
-		glLinkProgram(edgeshader_prog);
-
-		shaderinfo[0] = edgeshader_prog;
-		shaderinfo[1] = glGetUniformLocation(edgeshader_prog, "color1");
-		shaderinfo[2] = glGetUniformLocation(edgeshader_prog, "color2");
-		shaderinfo[3] = glGetAttribLocation(edgeshader_prog, "trig");
-		shaderinfo[4] = glGetAttribLocation(edgeshader_prog, "pos_b");
-		shaderinfo[5] = glGetAttribLocation(edgeshader_prog, "pos_c");
-		shaderinfo[6] = glGetAttribLocation(edgeshader_prog, "mask");
-		shaderinfo[7] = glGetUniformLocation(edgeshader_prog, "xscale");
-		shaderinfo[8] = glGetUniformLocation(edgeshader_prog, "yscale");
-
-		GLenum err = glGetError();
-		if (err != GL_NO_ERROR) {
-			fprintf(stderr, "OpenGL Error: %s\n", gluErrorString(err));
-		}
-
-		GLint status;
-		glGetProgramiv(edgeshader_prog, GL_LINK_STATUS, &status);
-		if (status == GL_FALSE) {
-			int loglen;
-			char logbuffer[1000];
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			fprintf(stderr, "OpenGL Program Linker Error:\n%.*s", loglen, logbuffer);
-		} else {
-			int loglen;
-			char logbuffer[1000];
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			if (loglen > 0) {
-				fprintf(stderr, "OpenGL Program Link OK:\n%.*s", loglen, logbuffer);
-			}
-			glValidateProgram(edgeshader_prog);
-			glGetProgramInfoLog(edgeshader_prog, sizeof(logbuffer), &loglen, logbuffer);
-			if (loglen > 0) {
-				fprintf(stderr, "OpenGL Program Validation results:\n%.*s", loglen, logbuffer);
-			}
-		}
-	}
-#endif
-}
-
-void QGLView::initializeGL()
-{
-	glEnable(GL_DEPTH_TEST);
-	glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY);
-
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-	GLfloat light_diffuse[] = {1.0, 1.0, 1.0, 1.0};
-	GLfloat light_position0[] = {-1.0, -1.0, +1.0, 0.0};
-	GLfloat light_position1[] = {+1.0, +1.0, -1.0, 0.0};
-
-	glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
-	glLightfv(GL_LIGHT0, GL_POSITION, light_position0);
-	glEnable(GL_LIGHT0);
-	glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
-	glLightfv(GL_LIGHT1, GL_POSITION, light_position1);
-	glEnable(GL_LIGHT1);
-	glEnable(GL_LIGHTING);
-	glEnable(GL_NORMALIZE);
-
-	glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
-	glEnable(GL_COLOR_MATERIAL);
-
-	enable_opencsg_shaders();
-}
-
-std::string QGLView::getRendererInfo() const
-{
-  std::string glewinfo = glew_dump();
-  std::string glextlist = glew_extensions_dump();
-  return glewinfo + std::string("\nUsing QGLWidget\n\n") + glextlist;
-}
-
-#ifdef ENABLE_OPENCSG
-void QGLView::display_opencsg_warning()
-{
-	OpenCSGWarningDialog *dialog = new OpenCSGWarningDialog(this);
-
-	QString message;
-	if (this->is_opencsg_capable) {
-		message += "Warning: You may experience OpenCSG rendering errors.\n\n";
-	}
-	else {
-		message += "Warning: Missing OpenGL capabilities for OpenCSG - OpenCSG has been disabled.\n\n";
-		dialog->enableOpenCSGBox->hide();
-	}
-	message += "It is highly recommended to use OpenSCAD on a system with "
-		"OpenGL 2.0 or later.\n"
-		"Your renderer information is as follows:\n";
-	QString rendererinfo;
-	rendererinfo.sprintf("GLEW version %s\n"
-											 "%s (%s)\n"
-											 "OpenGL version %s\n",
-											 glewGetString(GLEW_VERSION),
-											 glGetString(GL_RENDERER), glGetString(GL_VENDOR),
-											 glGetString(GL_VERSION));
-	message += rendererinfo;
-
-	dialog->setText(message);
-	dialog->enableOpenCSGBox->setChecked(Preferences::inst()->getValue("advanced/enable_opencsg_opengl1x").toBool());
-	dialog->exec();
-
-	opencsg_support = this->is_opencsg_capable && Preferences::inst()->getValue("advanced/enable_opencsg_opengl1x").toBool();
-}
-#endif
-
-void QGLView::resizeGL(int w, int h)
-{
-	GLView::resizeGL(w,h);
-	GLView::setupGimbalPerspective();
-}
-
-void QGLView::paintGL()
-{
-	glEnable(GL_LIGHTING);
-
-	if (orthomode) GLView::setupGimbalOrtho(viewer_distance);
-	else GLView::setupGimbalPerspective();
-
-	glMatrixMode(GL_MODELVIEW);
-	glLoadIdentity();
-
-	Color4f bgcol = RenderSettings::inst()->color(RenderSettings::BACKGROUND_COLOR);
-	glClearColor(bgcol[0], bgcol[1], bgcol[2], 0.0);
-
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
-
-	glRotated(object_rot.x(), 1.0, 0.0, 0.0);
-	glRotated(object_rot.y(), 0.0, 1.0, 0.0);
-	glRotated(object_rot.z(), 0.0, 0.0, 1.0);
-
-  // FIXME: Crosshairs and axes are lighted, this doesn't make sense and causes them
-  // to change color based on view orientation.
-	if (showcrosshairs)
-	{
-		glLineWidth(3);
-		Color4f col = RenderSettings::inst()->color(RenderSettings::CROSSHAIR_COLOR);
-		glColor3f(col[0], col[1], col[2]);
-		glBegin(GL_LINES);
-		for (double xf = -1; xf <= +1; xf += 2)
-		for (double yf = -1; yf <= +1; yf += 2) {
-			double vd = viewer_distance/20;
-			glVertex3d(-xf*vd, -yf*vd, -vd);
-			glVertex3d(+xf*vd, +yf*vd, +vd);
-		}
-		glEnd();
-	}
-
-	glTranslated(object_trans.x(), object_trans.y(), object_trans.z());
-
-	// Large gray axis cross inline with the model
-  // FIXME: This is always gray - adjust color to keep contrast with background
-	if (showaxes)
-	{
-		glLineWidth(1);
-		glColor3d(0.5, 0.5, 0.5);
-		glBegin(GL_LINES);
-		double l = viewer_distance/10;
-		glVertex3d(-l, 0, 0);
-		glVertex3d(+l, 0, 0);
-		glVertex3d(0, -l, 0);
-		glVertex3d(0, +l, 0);
-		glVertex3d(0, 0, -l);
-		glVertex3d(0, 0, +l);
-		glEnd();
-	}
-
-	glDepthFunc(GL_LESS);
-	glCullFace(GL_BACK);
-	glDisable(GL_CULL_FACE);
-
-	glLineWidth(2);
-	glColor3d(1.0, 0.0, 0.0);
-
-	if (this->renderer) {
-#if defined(ENABLE_MDI) && defined(ENABLE_OPENCSG)
-		// FIXME: This belongs in the OpenCSG renderer, but it doesn't know about this ID yet
-		OpenCSG::setContext(this->opencsg_id);
-#endif
-		this->renderer->draw(showfaces, showedges);
-	}
-
-	// Small axis cross in the lower left corner
-	if (showaxes)
-	{
-		glDepthFunc(GL_ALWAYS);
-
-		GLView::setupGimbalOrtho(1000,true);
-
-		glMatrixMode(GL_MODELVIEW);
-		glLoadIdentity();
-		glRotated(object_rot.x(), 1.0, 0.0, 0.0);
-		glRotated(object_rot.y(), 0.0, 1.0, 0.0);
-		glRotated(object_rot.z(), 0.0, 0.0, 1.0);
-
-		glLineWidth(1);
-		glBegin(GL_LINES);
-		glColor3d(1.0, 0.0, 0.0);
-		glVertex3d(0, 0, 0); glVertex3d(10, 0, 0);
-		glColor3d(0.0, 1.0, 0.0);
-		glVertex3d(0, 0, 0); glVertex3d(0, 10, 0);
-		glColor3d(0.0, 0.0, 1.0);
-		glVertex3d(0, 0, 0); glVertex3d(0, 0, 10);
-		glEnd();
-
-		GLdouble mat_model[16];
-		glGetDoublev(GL_MODELVIEW_MATRIX, mat_model);
-
-		GLdouble mat_proj[16];
-		glGetDoublev(GL_PROJECTION_MATRIX, mat_proj);
-
-		GLint viewport[4];
-		glGetIntegerv(GL_VIEWPORT, viewport);
-
-		GLdouble xlabel_x, xlabel_y, xlabel_z;
-		gluProject(12, 0, 0, mat_model, mat_proj, viewport, &xlabel_x, &xlabel_y, &xlabel_z);
-		xlabel_x = round(xlabel_x); xlabel_y = round(xlabel_y);
-
-		GLdouble ylabel_x, ylabel_y, ylabel_z;
-		gluProject(0, 12, 0, mat_model, mat_proj, viewport, &ylabel_x, &ylabel_y, &ylabel_z);
-		ylabel_x = round(ylabel_x); ylabel_y = round(ylabel_y);
-
-		GLdouble zlabel_x, zlabel_y, zlabel_z;
-		gluProject(0, 0, 12, mat_model, mat_proj, viewport, &zlabel_x, &zlabel_y, &zlabel_z);
-		zlabel_x = round(zlabel_x); zlabel_y = round(zlabel_y);
-
-		glMatrixMode(GL_PROJECTION);
-		glLoadIdentity();
-		glTranslated(-1, -1, 0);
-		glScaled(2.0/viewport[2], 2.0/viewport[3], 1);
-
-		glMatrixMode(GL_MODELVIEW);
-		glLoadIdentity();
-
-		// FIXME: This was an attempt to keep contrast with background, but is suboptimal
-		// (e.g. nearly invisible against a gray background).
-//		int r,g,b;
-//		r=g=b=0;
-//		bgcol.getRgb(&r, &g, &b);
-//		glColor3f((255.0f-r)/255.0f, (255.0f-g)/255.0f, (255.0f-b)/255.0f);
-		glColor3f(0.0f, 0.0f, 0.0f);
-		glBegin(GL_LINES);
-		// X Label
-		glVertex3d(xlabel_x-3, xlabel_y-3, 0); glVertex3d(xlabel_x+3, xlabel_y+3, 0);
-		glVertex3d(xlabel_x-3, xlabel_y+3, 0); glVertex3d(xlabel_x+3, xlabel_y-3, 0);
-		// Y Label
-		glVertex3d(ylabel_x-3, ylabel_y-3, 0); glVertex3d(ylabel_x+3, ylabel_y+3, 0);
-		glVertex3d(ylabel_x-3, ylabel_y+3, 0); glVertex3d(ylabel_x, ylabel_y, 0);
-		// Z Label
-		glVertex3d(zlabel_x-3, zlabel_y-3, 0); glVertex3d(zlabel_x+3, zlabel_y-3, 0);
-		glVertex3d(zlabel_x-3, zlabel_y+3, 0); glVertex3d(zlabel_x+3, zlabel_y+3, 0);
-		glVertex3d(zlabel_x-3, zlabel_y-3, 0); glVertex3d(zlabel_x+3, zlabel_y+3, 0);
-		glEnd();
-
-		//Restore perspective for next paint
-		if(!orthomode)
-			GLView::setupGimbalPerspective();
-	}
-
-	if (statusLabel) {
-		QString msg;
-		msg.sprintf("Viewport: translate = [ %.2f %.2f %.2f ], rotate = [ %.2f %.2f %.2f ], distance = %.2f",
-			-object_trans.x(), -object_trans.y(), -object_trans.z(),
-			fmodf(360 - object_rot.x() + 90, 360), fmodf(360 - object_rot.y(), 360), fmodf(360 - object_rot.z(), 360), viewer_distance);
-		statusLabel->setText(msg);
-	}
-
-	if (running_under_wine) swapBuffers();
-}
-
-void QGLView::keyPressEvent(QKeyEvent *event)
-{
-	if (event->key() == Qt::Key_Plus) {
-		viewer_distance *= 0.9;
-		updateGL();
-		return;
-	}
-	if (event->key() == Qt::Key_Minus) {
-		viewer_distance /= 0.9;
-		updateGL();
-		return;
-	}
-}
-
-void QGLView::wheelEvent(QWheelEvent *event)
-{
-	viewer_distance *= pow(0.9, event->delta() / 120.0);
-	updateGL();
-}
-
-void QGLView::mousePressEvent(QMouseEvent *event)
-{
-	mouse_drag_active = true;
-	last_mouse = event->globalPos();
-}
-
-void QGLView::normalizeAngle(GLdouble& angle)
-{
-	while(angle < 0)
-		angle += 360;
-	while(angle > 360)
-		angle -= 360;
-}
-
-void QGLView::mouseMoveEvent(QMouseEvent *event)
-{
-	QPoint this_mouse = event->globalPos();
-	double dx = (this_mouse.x()-last_mouse.x()) * 0.7;
-	double dy = (this_mouse.y()-last_mouse.y()) * 0.7;
-	if (mouse_drag_active) {
-		if (event->buttons() & Qt::LeftButton
-#ifdef Q_WS_MAC
-				&& !(event->modifiers() & Qt::MetaModifier)
-#endif
-			) {
-			// Left button rotates in xz, Shift-left rotates in xy
-			// On Mac, Ctrl-Left is handled as right button on other platforms
-			object_rot.x() += dy;
-			if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) != 0)
-				object_rot.y() += dx;
-			else
-				object_rot.z() += dx;
-
-			normalizeAngle(object_rot.x());
-			normalizeAngle(object_rot.y());
-			normalizeAngle(object_rot.z());
-		} else {
-			// Right button pans in the xz plane
-			// Middle button pans in the xy plane
-			// Shift-right and Shift-middle zooms
-			if ((QApplication::keyboardModifiers() & Qt::ShiftModifier) != 0) {
-				viewer_distance += (GLdouble)dy;
-			} else {
-
-      double mx = +(dx) * viewer_distance/1000;
-      double mz = -(dy) * viewer_distance/1000;
-
-			double my = 0;
-#if (QT_VERSION < QT_VERSION_CHECK(4, 7, 0))
-			if (event->buttons() & Qt::MidButton) {
-#else
-			if (event->buttons() & Qt::MiddleButton) {
-#endif
-				my = mz;
-				mz = 0;
-				// actually lock the x-position
-				// (turns out to be easier to use than xy panning)
-				mx = 0;
-			}
-
-			Matrix3d aax, aay, aaz, tm3;
-			aax = Eigen::AngleAxisd(-(object_rot.x()/180) * M_PI, Vector3d::UnitX());
-			aay = Eigen::AngleAxisd(-(object_rot.y()/180) * M_PI, Vector3d::UnitY());
-			aaz = Eigen::AngleAxisd(-(object_rot.z()/180) * M_PI, Vector3d::UnitZ());
-			tm3 = Matrix3d::Identity();
-			tm3 = aaz * (aay * (aax * tm3));
-
-			Matrix4d tm;
-			tm = Matrix4d::Identity();
-			for (int i=0;i<3;i++) for (int j=0;j<3;j++) tm(j,i)=tm3(j,i);
-
-			Matrix4d vec;
-			vec <<
-        0,  0,  0,  mx,
-        0,  0,  0,  my,
-        0,  0,  0,  mz,
-        0,  0,  0,  1
-			;
-      tm = tm * vec;
-      object_trans.x() += tm(0,3);
-      object_trans.y() += tm(1,3);
-      object_trans.z() += tm(2,3);
-			}
-		}
-		updateGL();
-		emit doAnimateUpdate();
-	}
-	last_mouse = this_mouse;
-}
-
-void QGLView::mouseReleaseEvent(QMouseEvent*)
-{
-	mouse_drag_active = false;
-	releaseMouse();
-}
-
-bool QGLView::save(const char *filename)
-{
-  QImage img = grabFrameBuffer();
-  return img.save(filename, "PNG");
-}
-
diff --git a/tests/csgtestcore.cc b/tests/csgtestcore.cc
index 1a414d5..29f92e4 100644
--- a/tests/csgtestcore.cc
+++ b/tests/csgtestcore.cc
@@ -240,7 +240,6 @@ int csgtestcore(int argc, char *argv[], test_type_e test_type)
 		fprintf(stderr,"Can't create OpenGL OffscreenView. Code: %i. Exiting.\n", error);
 		exit(1);
 	}
-	csgInfo.glview->enable_opencsg_shaders();
 
 	if (sysinfo_dump) cout << info_dump(csgInfo.glview);
 	Vector3d center(0,0,0);