1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*
* OpenSCAD (www.openscad.at)
* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
*
* 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.
*
* 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 "openscad.h"
#include <QWheelEvent>
#include <QMouseEvent>
#define FAR_FAR_AWAY 100000.0
GLView::GLView(QWidget *parent) : QGLWidget(parent)
{
viewer_distance = 20;
object_rot_y = 35;
object_rot_z = 25;
mouse_drag_active = false;
last_mouse_x = 0;
last_mouse_y = 0;
renderfunc = NULL;
renderfunc_vp = NULL;
setMouseTracking(true);
}
void GLView::initializeGL()
{
glEnable(GL_DEPTH_TEST);
glDepthRange(-FAR_FAR_AWAY, +FAR_FAR_AWAY);
glClearColor(1.0, 1.0, 0.9, 0.0);
#if 0
char *vs_source =
"attribute float e1, e2, e3;\n"
"varying float ve1, ve2, ve3;\n"
"void main() {\n"
" gl_FrontColor = gl_Color;\n"
" gl_Position = ftransform();\n"
" ve1 = e1; ve2 = e2; ve3 = e3;\n"
"}\n";
char *fs_source =
"#extension GL_EXT_gpu_shader4 : enable\n"
"varying float ve1, ve2, ve3;\n"
"void main() {\n"
" gl_FragColor = vec4(1.0,0.0,0.0,1.0);\n"
" if (ve1 > 0.9 || ve2 > 0.9 || ve3 > 0.9)\n"
" gl_FragColor = vec4(0.0,1.0,0.0,1.0);\n"
" gl_FragColor = gl_FrontColor;\n"
"}\n";
GLuint edgeshader_prog = glCreateProgram();
GLuint vs = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vs, 1, (const GLchar**)&vs_source, NULL);
glCompileShader(vs);
glAttachShader(edgeshader_prog, vs);
GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fs, 1, (const GLchar**)&fs_source, NULL);
glCompileShader(fs);
glAttachShader(edgeshader_prog, fs);
glLinkProgram(edgeshader_prog);
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);
}
}
glUseProgram(edgeshader_prog);
#endif
}
void GLView::resizeGL(int w, int h)
{
glViewport(0, 0, w, h);
w_h_ratio = sqrt((double)w / (double)h);
}
void GLView::paintGL()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-w_h_ratio, +w_h_ratio, -(1/w_h_ratio), +(1/w_h_ratio), +10.0, +FAR_FAR_AWAY);
gluLookAt(0.0, -viewer_distance, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotated(object_rot_y, 1.0, 0.0, 0.0);
glRotated(object_rot_z, 0.0, 0.0, 1.0);
glDepthFunc(GL_LESS);
glDisable(GL_LIGHTING);
#if 0
glLineWidth(1);
glColor3d(0.0, 0.0, 1.0);
glBegin(GL_LINES);
glVertex3d(0, 0, 0); glVertex3d(10, 0, 0);
glVertex3d(0, 0, 0); glVertex3d(0, 10, 0);
glVertex3d(0, 0, 0); glVertex3d(0, 0, 10);
glEnd();
#endif
glLineWidth(2);
glColor3d(1.0, 0.0, 0.0);
if (renderfunc)
renderfunc(renderfunc_vp);
}
void GLView::wheelEvent(QWheelEvent *event)
{
viewer_distance *= pow(0.9, event->delta() / 120.0);
updateGL();
}
void GLView::mousePressEvent(QMouseEvent *event)
{
mouse_drag_active = true;
last_mouse_x = event->globalX();
last_mouse_y = event->globalY();
grabMouse();
}
void GLView::mouseMoveEvent(QMouseEvent *event)
{
int this_mouse_x = event->globalX();
int this_mouse_y = event->globalY();
if (mouse_drag_active) {
object_rot_y += (this_mouse_y-last_mouse_y) * 0.7;
object_rot_z += (this_mouse_x-last_mouse_x) * 0.7;
updateGL();
}
last_mouse_x = this_mouse_x;
last_mouse_y = this_mouse_y;
}
void GLView::mouseReleaseEvent(QMouseEvent*)
{
mouse_drag_active = false;
releaseMouse();
}
|
