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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
|
/*
* Portions Copyright (C) 2003 Sun Microsystems, Inc.
* All rights reserved.
*/
/*
*
* COPYRIGHT NVIDIA CORPORATION 2003. ALL RIGHTS RESERVED.
* BY ACCESSING OR USING THIS SOFTWARE, YOU AGREE TO:
*
* 1) ACKNOWLEDGE NVIDIA'S EXCLUSIVE OWNERSHIP OF ALL RIGHTS
* IN AND TO THE SOFTWARE;
*
* 2) NOT MAKE OR DISTRIBUTE COPIES OF THE SOFTWARE WITHOUT
* INCLUDING THIS NOTICE AND AGREEMENT;
*
* 3) ACKNOWLEDGE THAT TO THE MAXIMUM EXTENT PERMITTED BY
* APPLICABLE LAW, THIS SOFTWARE IS PROVIDED *AS IS* AND
* THAT NVIDIA AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES,
* EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
* TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL NVIDIA OR ITS SUPPLIERS BE LIABLE FOR ANY
* SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES
* WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS
* OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS
* INFORMATION, OR ANY OTHER PECUNIARY LOSS), INCLUDING ATTORNEYS'
* FEES, RELATING TO THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
*/
package demos.vertexProgRefract;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.nio.*;
import java.util.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import javax.swing.*;
import javax.media.opengl.*;
import com.sun.opengl.utils.*;
import com.sun.opengl.utils.*;
import demos.common.*;
import demos.util.*;
import gleem.*;
import gleem.linalg.*;
/**
Wavelength-dependent refraction demo<br>
It's a chromatic aberration!<br>
sgreen@nvidia.com 4/2001<br><p>
Currently 3 passes - could do it in 1 with 4 texture units<p>
Cubemap courtesy of Paul Debevec<p>
Ported to Java and ARB_fragment_program by Kenneth Russell
*/
public class VertexProgRefract extends Demo {
public static void main(String[] args) {
GLCanvas canvas = GLDrawableFactory.getFactory().createGLCanvas(new GLCapabilities());
VertexProgRefract demo = new VertexProgRefract();
canvas.addGLEventListener(demo);
final Animator animator = new Animator(canvas);
demo.setDemoListener(new DemoListener() {
public void shutdownDemo() {
runExit(animator);
}
public void repaint() {}
});
Frame frame = new Frame("Refraction Using Vertex Programs");
frame.setLayout(new BorderLayout());
canvas.setSize(512, 512);
frame.add(canvas, BorderLayout.CENTER);
frame.pack();
frame.show();
canvas.requestFocus();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
runExit(animator);
}
});
animator.start();
}
private boolean useRegisterCombiners;
private boolean initComplete;
private boolean firstRender = true;
private int vtxProg;
private int fragProg;
private int cubemap;
private int bunnydl;
private int obj;
private GLUT glut = new GLUT();
private GLAutoDrawable drawable;
private ExaminerViewer viewer;
private boolean doViewAll = true;
private Time time = new SystemTime();
private float animRate = (float) Math.toRadians(-6.0f); // Radians / sec
private float refract = 1.1f; // ratio of indicies of refraction
private float wavelengthDelta = 0.05f; // difference in refraction for each "wavelength" (R,G,B)
private float fresnel = 2.0f; // Fresnel multiplier
private boolean wire = false;
private boolean toggleWire = false;
private static final String transformRefract =
"!!ARBvp1.0\n" +
"# Refraction\n" +
"\n" +
"# Parameters\n" +
"PARAM mvp [4] = { state.matrix.mvp }; # modelview projection matrix\n" +
"PARAM mvit[4] = { state.matrix.modelview.invtrans }; # modelview matrix inverse transpose\n" +
"PARAM mv [4] = { state.matrix.modelview }; # modelview matrix\n" +
"PARAM tex [4] = { state.matrix.texture }; # texture matrix\n" +
"PARAM eyePosition = program.env[0]; # eye position\n" +
"PARAM fresnel = program.env[1]; # fresnel multiplier\n" +
"PARAM texScale = program.env[2]; # texture scale\n" +
"PARAM misc = program.env[3]; # misc. constants\n" +
"PARAM refraction = program.env[4]; # refractive index\n" +
"\n" +
"# Per vertex inputs\n" +
"ATTRIB iPos = vertex.position; #position\n" +
"ATTRIB iCol0 = vertex.color; #color\n" +
"ATTRIB iNorm = vertex.normal; #normal\n" +
"\n" +
"# Temporaries\n" +
"TEMP r0;\n" +
"TEMP r1;\n" +
"TEMP r2;\n" +
"TEMP r3;\n" +
"TEMP r8;\n" +
"TEMP r9;\n" +
"TEMP r11;\n" +
"\n" +
"# Outputs\n" +
"OUTPUT oPos = result.position; #position\n" +
"OUTPUT oCol0 = result.color; #primary color\n" +
"OUTPUT oTex0 = result.texcoord[0]; #texture coordinate set 0\n" +
"OUTPUT oTex1 = result.texcoord[1]; #texture coordinate set 1\n" +
"\n" +
"\n" +
"# transform vertex position to eye space\n" +
"DP4 r9.x, mv[0], iPos ;\n" +
"DP4 r9.y, mv[1], iPos ;\n" +
"DP4 r9.z, mv[2], iPos ;\n" +
"DP4 r9.w, mv[3], iPos ;\n" +
"\n" +
"# transform normal to eye space\n" +
"DP3 r11.x, mvit[0], iNorm ;\n" +
"DP3 r11.y, mvit[1], iNorm ;\n" +
"DP3 r11.z, mvit[2], iNorm ;\n" +
"\n" +
"# vertex->eye vector\n" +
"ADD r0, -r9, eyePosition;\n" +
"\n" +
"# normalize\n" +
"DP3 r8.w, r0, r0;\n" +
"RSQ r8.w, r8.w;\n" +
"MUL r8, r0, r8.w; # r8 = eye/incident vector\n" +
"\n" +
"# refraction, Renderman style\n" +
"\n" +
"# float IdotN = I.N;\n" +
"# float k = 1 - eta*eta*(1 - IdotN*IdotN);\n" +
"# return k < 0 ? (0,0,0) : eta*I - (eta*IdotN + sqrt(k))*N;\n" +
"\n" +
"DP3 r0.x, r11, -r8; # r0 = N.I\n" +
"\n" +
"MAD r1.x, -r0.x, r0.x, misc.y; # r1 = -IdotN*IdotN + 1\n" +
"MUL r1.x, r1.x, refraction.y; # r1 = -(r1*eta*eta)+1\n" +
"ADD r1.x, misc.y, -r1.x;\n" +
"\n" +
"RSQ r2.x, r1.x;\n" +
"RCP r2.x, r2.x;\n" +
"MAD r2.x, refraction.x, r0.x, r2.x;\n" +
"MUL r2, r11, r2.x;\n" +
"MAD r2, refraction.x, -r8, r2;\n" +
"\n" +
"# transform refracted ray by cubemap transform\n" +
"DP3 oTex0.x, tex[0], r2;\n" +
"DP3 oTex0.y, tex[1], r2;\n" +
"DP3 oTex0.z, tex[2], r2;\n" +
"\n" +
"# calculate reflection\n" +
"MUL r0, r11, misc.z;\n" +
"DP3 r3.w, r11, r8;\n" +
"MAD r3, r3.w, r0, -r8;\n" +
"\n" +
"# transform reflected ray by cubemap transform\n" +
"DP3 oTex1.x, tex[0], r3;\n" +
"DP3 oTex1.y, tex[1], r3;\n" +
"DP3 oTex1.z, tex[2], r3;\n" +
"\n" +
"# cheesy Fresnel approximation = (1-(I.N))^p\n" +
"DP3 r0.x, r8, r11;\n" +
"ADD r0.x, misc.y, -r0.x;\n" +
"MUL r0.x, r0.x, r0.x;\n" +
"MUL oCol0, r0.x, fresnel;\n" +
"\n" +
"# transform vertex to clip space\n" +
"DP4 oPos.x, mvp[0], iPos ;\n" +
"DP4 oPos.y, mvp[1], iPos ;\n" +
"DP4 oPos.z, mvp[2], iPos ;\n" +
"DP4 oPos.w, mvp[3], iPos ;\n" +
"\n" +
"END\n";
public void init(GLAutoDrawable drawable) {
initComplete = false;
GL gl = drawable.getGL();
GLU glu = drawable.getGLU();
float cc = 1.0f;
gl.glClearColor(cc, cc, cc, 1);
gl.glColor3f(1,1,1);
gl.glEnable(GL.GL_DEPTH_TEST);
try {
initExtension(gl, "GL_ARB_vertex_program");
initExtension(gl, "GL_VERSION_1_3"); // For multitexturing support
if (!gl.isExtensionAvailable("GL_ARB_fragment_program")) {
if (gl.isExtensionAvailable("GL_NV_register_combiners")) {
useRegisterCombiners = true;
} else {
final String message = "This demo requires either the GL_ARB_fragment_program\n" +
"or GL_NV_register_combiners extension";
new Thread(new Runnable() {
public void run() {
JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE);
shutdownDemo();
}
}).start();
throw new RuntimeException(message);
}
}
} catch (RuntimeException e) {
shutdownDemo();
throw(e);
}
b[' '] = true; // animate by default
int[] vtxProgTmp = new int[1];
gl.glGenProgramsARB(1, vtxProgTmp, 0);
vtxProg = vtxProgTmp[0];
gl.glBindProgramARB (GL.GL_VERTEX_PROGRAM_ARB, vtxProg);
gl.glProgramStringARB(GL.GL_VERTEX_PROGRAM_ARB, GL.GL_PROGRAM_FORMAT_ASCII_ARB, transformRefract.length(), transformRefract);
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 0, 0.0f, 0.0f, 0.0f, 1.0f); // eye position
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 1, fresnel, fresnel, fresnel, 1.0f); // fresnel multiplier
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 2, 1.0f, -1.0f, 1.0f, 0.0f); // texture scale
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 3, 0.0f, 1.0f, 2.0f, 3.0f); // misc constants
int[] cubemapTmp = new int[1];
gl.glGenTextures(1, cubemapTmp, 0);
cubemap = cubemapTmp[0];
gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP, cubemap);
gl.glTexParameteri(GL.GL_TEXTURE_CUBE_MAP, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_CUBE_MAP, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR_MIPMAP_LINEAR);
try {
loadPNGCubemap(gl, glu, "demos/data/cubemaps/uffizi", true);
} catch (IOException e) {
shutdownDemo();
throw new RuntimeException(e);
}
gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);
gl.glDisable(GL.GL_CULL_FACE);
if (useRegisterCombiners) {
initCombiners(gl);
} else {
initFragmentProgram(gl);
}
try {
bunnydl = Bunny.gen3DObjectList(gl);
} catch (IOException e) {
throw new RuntimeException(e);
}
doViewAll = true;
// Do this only once per drawable, not once each time the OpenGL
// context is created
if (firstRender) {
firstRender = false;
drawable.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
dispatchKey(e.getKeyChar());
}
});
// Register the window with the ManipManager
ManipManager manager = ManipManager.getManipManager();
manager.registerWindow(drawable);
this.drawable = drawable;
viewer = new ExaminerViewer(MouseButtonHelper.numMouseButtons());
viewer.setNoAltKeyMode(true);
viewer.setAutoRedrawMode(false);
viewer.attach(drawable, new BSphereProvider() {
public BSphere getBoundingSphere() {
return new BSphere(new Vec3f(0, 0, 0), 1.0f);
}
});
viewer.setVertFOV((float) (15.0f * Math.PI / 32.0f));
viewer.setZNear(0.1f);
viewer.setZFar(10.0f);
}
initComplete = true;
}
public void display(GLAutoDrawable drawable) {
if (!initComplete) {
return;
}
time.update();
GL gl = drawable.getGL();
GLU glu = drawable.getGLU();
gl.glClear(GL.GL_COLOR_BUFFER_BIT|GL.GL_DEPTH_BUFFER_BIT);
if (doViewAll) {
viewer.viewAll(gl);
doViewAll = false;
}
if (getFlag(' ')) {
viewer.rotateAboutFocalPoint(new Rotf(Vec3f.Y_AXIS, (float) (time.deltaT() * animRate)));
}
if (toggleWire) {
toggleWire = false;
wire = !wire;
if (wire) {
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE);
} else {
gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
}
}
// draw background
gl.glDisable(GL.GL_DEPTH_TEST);
drawSkyBox(gl, glu);
gl.glEnable(GL.GL_DEPTH_TEST);
gl.glPushMatrix();
viewer.update(gl);
ManipManager.getManipManager().updateCameraParameters(drawable, viewer.getCameraParameters());
ManipManager.getManipManager().render(drawable, gl);
gl.glBindProgramARB(GL.GL_VERTEX_PROGRAM_ARB, vtxProg);
gl.glEnable(GL.GL_VERTEX_PROGRAM_ARB);
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 62, fresnel, fresnel, fresnel, 1.0f);
// set texture transforms
gl.glActiveTexture(GL.GL_TEXTURE0);
gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP, cubemap);
gl.glEnable(GL.GL_TEXTURE_CUBE_MAP);
gl.glMatrixMode(GL.GL_TEXTURE);
gl.glLoadIdentity();
gl.glScalef(1.0f, -1.0f, 1.0f);
viewer.updateInverseRotation(gl);
gl.glActiveTexture(GL.GL_TEXTURE1);
gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP, cubemap);
gl.glEnable(GL.GL_TEXTURE_CUBE_MAP);
gl.glMatrixMode(GL.GL_TEXTURE);
gl.glLoadIdentity();
gl.glScalef(1.0f, -1.0f, 1.0f);
viewer.updateInverseRotation(gl);
if (useRegisterCombiners) {
gl.glEnable(GL.GL_REGISTER_COMBINERS_NV);
} else {
gl.glBindProgramARB(GL.GL_FRAGMENT_PROGRAM_ARB, fragProg);
gl.glEnable(GL.GL_FRAGMENT_PROGRAM_ARB);
}
gl.glColor3f(1.0f, 1.0f, 1.0f);
if (getFlag('s')) {
// single pass
setRefraction(gl, refract);
drawObj(gl, glu, obj);
} else {
// red pass
gl.glColorMask(true, false, false, false);
setRefraction(gl, refract);
drawObj(gl, glu, obj);
gl.glDepthMask(false);
gl.glDepthFunc(GL.GL_EQUAL);
// green pass
gl.glColorMask(false, true, false, false);
setRefraction(gl, refract + wavelengthDelta);
drawObj(gl, glu, obj);
// blue pass
gl.glColorMask(false, false, true, false);
setRefraction(gl, refract + (wavelengthDelta * 2));
drawObj(gl, glu, obj);
gl.glDepthMask(true);
gl.glDepthFunc(GL.GL_LESS);
gl.glColorMask(true, true, true, false);
}
if (useRegisterCombiners) {
gl.glDisable(GL.GL_REGISTER_COMBINERS_NV);
} else {
gl.glDisable(GL.GL_FRAGMENT_PROGRAM_ARB);
}
gl.glDisable(GL.GL_VERTEX_PROGRAM_ARB);
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glPopMatrix();
}
// Unused routines
public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {}
public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {}
//----------------------------------------------------------------------
// Internals only below this point
//
public void shutdownDemo() {
ManipManager.getManipManager().unregisterWindow(drawable);
drawable.removeGLEventListener(this);
super.shutdownDemo();
}
private boolean[] b = new boolean[256];
private void dispatchKey(char k) {
setFlag(k, !getFlag(k));
// Quit on escape or 'q'
if ((k == (char) 27) || (k == 'q')) {
shutdownDemo();
return;
}
switch (k) {
case '1':
obj = 0;
break;
case '2':
obj = 1;
break;
case '3':
obj = 2;
break;
case '4':
obj = 3;
break;
case 'v':
doViewAll = true;
break;
case 'w':
toggleWire = true;
break;
default:
break;
}
}
private void setFlag(char key, boolean val) {
b[((int) key) & 0xFF] = val;
}
private boolean getFlag(char key) {
return b[((int) key) & 0xFF];
}
// FIXME: note we found that we had to swap the negy and posy portions of the cubemap.
// Not sure why this is the case. Vertical flip in the image read? Possible, but doesn't
// appear to be the case (have tried this and produced wrong results at the time).
String[] suffixes = { "posx", "negx", "negy", "posy", "posz", "negz" };
int[] targets = { GL.GL_TEXTURE_CUBE_MAP_POSITIVE_X,
GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
GL.GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
GL.GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
GL.GL_TEXTURE_CUBE_MAP_NEGATIVE_Z };
private void loadPNGCubemap(GL gl, GLU glu, String baseName, boolean mipmapped) throws IOException {
for (int i = 0; i < suffixes.length; i++) {
String resourceName = baseName + "_" + suffixes[i] + ".png";
// Note: use of BufferedInputStream works around 4764639/4892246
BufferedImage img = ImageIO.read(new BufferedInputStream(getClass().getClassLoader().getResourceAsStream(resourceName)));
if (img == null) {
throw new RuntimeException("Error reading PNG image " + resourceName);
}
makeRGBTexture(gl, glu, img, targets[i], mipmapped);
}
}
private void makeRGBTexture(GL gl, GLU glu, BufferedImage img, int target, boolean mipmapped) {
switch (img.getType()) {
case BufferedImage.TYPE_3BYTE_BGR:
case BufferedImage.TYPE_CUSTOM: {
byte[] data = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
if (mipmapped) {
glu.gluBuild2DMipmaps(target, GL.GL_RGB8, img.getWidth(), img.getHeight(), GL.GL_RGB,
GL.GL_UNSIGNED_BYTE, data);
} else {
gl.glTexImage2D(target, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0,
GL.GL_RGB, GL.GL_UNSIGNED_BYTE, ByteBuffer.wrap(data));
}
break;
}
case BufferedImage.TYPE_INT_RGB: {
int[] data = ((DataBufferInt) img.getRaster().getDataBuffer()).getData();
if (mipmapped) {
glu.gluBuild2DMipmaps(target, GL.GL_RGB8, img.getWidth(), img.getHeight(), GL.GL_RGB,
GL.GL_UNSIGNED_BYTE, data);
} else {
gl.glTexImage2D(target, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0,
GL.GL_RGB, GL.GL_UNSIGNED_BYTE, IntBuffer.wrap(data));
}
break;
}
default:
throw new RuntimeException("Unsupported image type " + img.getType());
}
}
private void initExtension(GL gl, String glExtensionName) {
if (!gl.isExtensionAvailable(glExtensionName)) {
final String message = "OpenGL extension \"" + glExtensionName + "\" not available";
new Thread(new Runnable() {
public void run() {
JOptionPane.showMessageDialog(null, message, "Unavailable extension", JOptionPane.ERROR_MESSAGE);
shutdownDemo();
}
}).start();
throw new RuntimeException(message);
}
}
// initalize texture combiners to compute:
// refraction*(1-fresnel) + reflection*fresnel
private void initCombiners(GL gl) {
gl.glCombinerParameteriNV(GL.GL_NUM_GENERAL_COMBINERS_NV, 1);
// combiner 0
// a*b+c*d
gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_A_NV, GL.GL_TEXTURE0, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_B_NV, GL.GL_PRIMARY_COLOR_NV, GL.GL_UNSIGNED_INVERT_NV, GL.GL_RGB);
gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_C_NV, GL.GL_TEXTURE1, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
gl.glCombinerInputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_VARIABLE_D_NV, GL.GL_PRIMARY_COLOR_NV, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
// output:
// (stage, portion, abOutput, cdOutput, sumOutput, scale, bias, abDotProduct, cdDotProduct, muxSum)
gl.glCombinerOutputNV(GL.GL_COMBINER0_NV, GL.GL_RGB, GL.GL_DISCARD_NV, GL.GL_DISCARD_NV, GL.GL_SPARE0_NV, GL.GL_NONE, GL.GL_NONE, false, false, false);
// final combiner
// output: Frgb = A*B + (1-A)*C + D
// (variable, input, mapping, componentUsage);
gl.glFinalCombinerInputNV(GL.GL_VARIABLE_A_NV, GL.GL_SPARE0_NV, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
gl.glFinalCombinerInputNV(GL.GL_VARIABLE_B_NV, GL.GL_ZERO, GL.GL_UNSIGNED_INVERT_NV, GL.GL_RGB);
gl.glFinalCombinerInputNV(GL.GL_VARIABLE_C_NV, GL.GL_ZERO, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
gl.glFinalCombinerInputNV(GL.GL_VARIABLE_D_NV, GL.GL_ZERO, GL.GL_UNSIGNED_IDENTITY_NV, GL.GL_RGB);
}
private void initFragmentProgram(GL gl) {
int[] fragProgTmp = new int[1];
gl.glGenProgramsARB(1, fragProgTmp, 0);
fragProg = fragProgTmp[0];
String combineFragProg =
"!!ARBfp1.0\n" +
"# compute refraction*(1-fresnel) + reflection*fresnel\n" +
"TEMP texSamp0, texSamp1;\n" +
"TEMP invFresnel;\n" +
"PARAM one = { 1.0, 1.0, 1.0, 1.0 };\n" +
"TEX texSamp0, fragment.texcoord[0], texture[0], CUBE;\n" +
"TEX texSamp1, fragment.texcoord[1], texture[1], CUBE;\n" +
"SUB invFresnel, one, fragment.color;\n" +
"MUL texSamp0, texSamp0, invFresnel;\n" +
"MUL texSamp1, texSamp1, fragment.color;\n" +
"ADD texSamp0, texSamp0, texSamp1;\n" +
"MOV result.color, texSamp0;\n" +
"END";
gl.glBindProgramARB (GL.GL_FRAGMENT_PROGRAM_ARB, fragProg);
gl.glProgramStringARB(GL.GL_FRAGMENT_PROGRAM_ARB, GL.GL_PROGRAM_FORMAT_ASCII_ARB,
combineFragProg.length(), combineFragProg);
int[] errPos = new int[1];
gl.glGetIntegerv(GL.GL_PROGRAM_ERROR_POSITION_ARB, errPos, 0);
if (errPos[0] >= 0) {
System.out.println("Fragment program failed to load:");
String errMsg = gl.glGetString(GL.GL_PROGRAM_ERROR_STRING_ARB);
if (errMsg == null) {
System.out.println("[No error message available]");
} else {
System.out.println("Error message: \"" + errMsg + "\"");
}
System.out.println("Error occurred at position " + errPos[0] + " in program:");
int endPos = errPos[0];
while (endPos < combineFragProg.length() && combineFragProg.charAt(endPos) != '\n') {
++endPos;
}
System.out.println(combineFragProg.substring(errPos[0], endPos));
}
}
private void drawSkyBox(GL gl, GLU glu) {
// Compensates for ExaminerViewer's modification of modelview matrix
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glActiveTexture(GL.GL_TEXTURE1);
gl.glDisable(GL.GL_TEXTURE_CUBE_MAP);
gl.glActiveTexture(GL.GL_TEXTURE0);
gl.glBindTexture(GL.GL_TEXTURE_CUBE_MAP, cubemap);
gl.glEnable(GL.GL_TEXTURE_CUBE_MAP);
// This is a workaround for a driver bug on Mac OS X where the
// normals are not being sent down to the hardware in
// GL_NORMAL_MAP texgen mode. Temporarily enabling lighting
// causes the normals to be sent down. Thanks to Ken Dyke.
gl.glEnable(GL.GL_LIGHTING);
gl.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP);
gl.glTexGeni(GL.GL_T, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP);
gl.glTexGeni(GL.GL_R, GL.GL_TEXTURE_GEN_MODE, GL.GL_NORMAL_MAP);
gl.glEnable(GL.GL_TEXTURE_GEN_S);
gl.glEnable(GL.GL_TEXTURE_GEN_T);
gl.glEnable(GL.GL_TEXTURE_GEN_R);
gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);
gl.glMatrixMode(GL.GL_TEXTURE);
gl.glPushMatrix();
gl.glLoadIdentity();
gl.glScalef(1.0f, -1.0f, 1.0f);
viewer.updateInverseRotation(gl);
glut.glutSolidSphere(glu, 5.0, 40, 20);
gl.glDisable(GL.GL_LIGHTING);
gl.glPopMatrix();
gl.glMatrixMode(GL.GL_MODELVIEW);
gl.glDisable(GL.GL_TEXTURE_GEN_S);
gl.glDisable(GL.GL_TEXTURE_GEN_T);
gl.glDisable(GL.GL_TEXTURE_GEN_R);
}
private void drawObj(GL gl, GLU glu, int obj) {
switch(obj) {
case 0:
gl.glCallList(bunnydl);
break;
case 1:
glut.glutSolidSphere(glu, 0.5, 64, 64);
break;
case 2:
glut.glutSolidTorus(gl, 0.25, 0.5, 64, 64);
break;
case 3:
drawPlane(gl, 1.0f, 1.0f, 50, 50);
break;
}
}
private void setRefraction(GL gl, float index) {
gl.glProgramEnvParameter4fARB(GL.GL_VERTEX_PROGRAM_ARB, 4, index, index*index, 0.0f, 0.0f);
}
// draw square subdivided into quad strips
private void drawPlane(GL gl, float w, float h, int rows, int cols) {
int x, y;
float vx, vy, s, t;
float ts, tt, tw, th;
ts = 1.0f / cols;
tt = 1.0f / rows;
tw = w / cols;
th = h / rows;
gl.glNormal3f(0.0f, 0.0f, 1.0f);
for(y=0; y<rows; y++) {
gl.glBegin(GL.GL_QUAD_STRIP);
for(x=0; x<=cols; x++) {
vx = tw * x -(w/2.0f);
vy = th * y -(h/2.0f);
s = ts * x;
t = tt * y;
gl.glTexCoord2f(s, t);
gl.glColor3f(s, t, 0.0f);
gl.glVertex3f(vx, vy, 0.0f);
gl.glColor3f(s, t + tt, 0.0f);
gl.glTexCoord2f(s, t + tt);
gl.glVertex3f(vx, vy + th, 0.0f);
}
gl.glEnd();
}
}
private static void runExit(final Animator animator) {
// Note: calling System.exit() synchronously inside the draw,
// reshape or init callbacks can lead to deadlocks on certain
// platforms (in particular, X11) because the JAWT's locking
// routines cause a global AWT lock to be grabbed. Instead run
// the exit routine in another thread.
new Thread(new Runnable() {
public void run() {
animator.stop();
System.exit(0);
}
}).start();
}
}
|