add files removed from test path

1 files changed, 170 insertions, 0 deletions

diff --git a/src/OffscreenView.cc b/src/OffscreenView.cc
new file mode 100644
index 0000000..61d5818
--- /dev/null
+++ b/src/OffscreenView.cc
@@ -0,0 +1,170 @@
+#include <GL/glew.h>
+#include "OffscreenView.h"
+#include "system-gl.h"
+#include "renderer.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+#include <cstdlib>
+#include <sstream>
+
+#define FAR_FAR_AWAY 100000.0
+
+OffscreenView::OffscreenView(size_t width, size_t height)
+	: orthomode(false), showaxes(false), showfaces(true), showedges(false),
+		object_rot(35, 0, 25), camera_eye(0, 0, 0), camera_center(0, 0, 0)
+{
+	for (int i = 0; i < 10; i++) this->shaderinfo[i] = 0;
+	this->ctx = create_offscreen_context(width, height);
+	if ( this->ctx == NULL ) throw -1;
+
+	initializeGL();
+	resizeGL(width, height);
+}
+
+OffscreenView::~OffscreenView()
+{
+	teardown_offscreen_context(this->ctx);
+}
+
+void OffscreenView::setRenderer(Renderer* r)
+{
+	this->renderer = r;
+}
+
+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);
+
+
+}
+
+void OffscreenView::resizeGL(int w, int h)
+{
+	this->width = w;
+	this->height = h;
+	glViewport(0, 0, w, h);
+	w_h_ratio = sqrt((double)w / (double)h);
+}
+
+void OffscreenView::setupPerspective()
+{
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	double dist = (this->camera_center - this->camera_eye).norm();
+	gluPerspective(45, w_h_ratio, 0.1*dist, 100*dist);
+}
+
+void OffscreenView::setupOrtho(bool offset)
+{
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	if (offset) glTranslated(-0.8, -0.8, 0);
+	double l = (this->camera_center - this->camera_eye).norm() / 10;
+	glOrtho(-w_h_ratio*l, +w_h_ratio*l,
+					-(1/w_h_ratio)*l, +(1/w_h_ratio)*l,
+					-FAR_FAR_AWAY, +FAR_FAR_AWAY);
+}
+
+void OffscreenView::paintGL()
+{
+	glEnable(GL_LIGHTING);
+
+	if (orthomode) setupOrtho();
+	else setupPerspective();
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+
+	glClearColor(1.0f, 1.0f, 0.92f, 1.0f);
+
+	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);
+
+	// 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
+  // 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);
+	}
+}
+
+bool OffscreenView::save(const char *filename)
+{
+	return save_framebuffer(this->ctx, filename);
+}
+
+std::string OffscreenView::getInfo()
+{
+	std::stringstream out;
+	GLint rbits, gbits, bbits, abits, dbits, sbits;
+	glGetIntegerv(GL_RED_BITS, &rbits);
+	glGetIntegerv(GL_GREEN_BITS, &gbits);
+	glGetIntegerv(GL_BLUE_BITS, &bbits);
+	glGetIntegerv(GL_ALPHA_BITS, &abits);
+	glGetIntegerv(GL_DEPTH_BITS, &dbits);
+	glGetIntegerv(GL_STENCIL_BITS, &sbits);
+
+	out << glew_dump(false)
+	    << "FBO: RGBA(" << rbits << gbits << bbits << abits
+	    << "), depth(" << dbits
+	    << "), stencil(" << sbits << ")\n"
+	    << offscreen_context_getinfo(this->ctx);
+
+	return out.str();
+}
+
+void OffscreenView::setCamera(const Eigen::Vector3d &pos, const Eigen::Vector3d &center)
+{
+	this->camera_eye = pos;
+	this->camera_center = center;
+}
+