rev |
line source |
nuclear@1
|
1 #include <stdio.h>
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nuclear@12
|
2 #include <GL/glew.h>
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nuclear@1
|
3 #include "vr.h"
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nuclear@1
|
4 #include "vr_impl.h"
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nuclear@15
|
5 #include "vr_sdr.h"
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nuclear@12
|
6
|
nuclear@1
|
7 static bool init_ovr();
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nuclear@12
|
8 static bool init_sdr();
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nuclear@1
|
9
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nuclear@3
|
10 VRContext vr_ctx;
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nuclear@12
|
11 static unsigned int sdrprog;
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nuclear@1
|
12
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nuclear@1
|
13 extern "C" int vr_init(enum vr_init_mode mode)
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nuclear@1
|
14 {
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nuclear@12
|
15 glewInit();
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nuclear@12
|
16
|
nuclear@1
|
17 if(!init_ovr()) {
|
nuclear@1
|
18 return -1;
|
nuclear@1
|
19 }
|
nuclear@12
|
20
|
nuclear@12
|
21 if(!init_sdr()) {
|
nuclear@12
|
22 return -1;
|
nuclear@12
|
23 }
|
nuclear@12
|
24
|
nuclear@1
|
25 return 0;
|
nuclear@1
|
26 }
|
nuclear@1
|
27
|
nuclear@1
|
28 extern "C" void vr_shutdown(void)
|
nuclear@1
|
29 {
|
nuclear@15
|
30 delete [] vr_ctx.info.display;
|
nuclear@3
|
31 //System::Destroy();
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nuclear@1
|
32 }
|
nuclear@1
|
33
|
nuclear@1
|
34 static bool init_ovr()
|
nuclear@1
|
35 {
|
nuclear@8
|
36 LogMaskConstants log_level = LogMask_All;
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nuclear@1
|
37 // initialize Oculus SDK
|
nuclear@5
|
38 const char *logenv = getenv("VR_LOGLEVEL");
|
nuclear@5
|
39 if(logenv) {
|
nuclear@5
|
40 switch(atoi(logenv)) {
|
nuclear@5
|
41 case 0:
|
nuclear@5
|
42 log_level = LogMask_None;
|
nuclear@5
|
43 break;
|
nuclear@5
|
44 case 1:
|
nuclear@5
|
45 log_level = LogMask_Regular;
|
nuclear@5
|
46 break;
|
nuclear@5
|
47 case 2:
|
nuclear@5
|
48 default:
|
nuclear@5
|
49 log_level = LogMask_All;
|
nuclear@5
|
50 break;
|
nuclear@5
|
51 }
|
nuclear@5
|
52 }
|
nuclear@5
|
53
|
nuclear@5
|
54 System::Init(Log::ConfigureDefaultLog(log_level));
|
nuclear@3
|
55 if(!(vr_ctx.ovr_devman = DeviceManager::Create())) {
|
nuclear@1
|
56 fprintf(stderr, "failed to create OVR device manager\n");
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nuclear@1
|
57 return false;
|
nuclear@1
|
58 }
|
nuclear@1
|
59
|
nuclear@1
|
60 // create the display device
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nuclear@4
|
61 HMDInfo info;
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nuclear@3
|
62 if(!(vr_ctx.ovr_hmd_dev = vr_ctx.ovr_devman->EnumerateDevices<HMDDevice>().CreateDevice())) {
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nuclear@1
|
63 fprintf(stderr, "no oculus rift devices found\n");
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nuclear@4
|
64 } else {
|
nuclear@4
|
65 if(vr_ctx.ovr_hmd_dev->GetDeviceInfo(&info)) {
|
nuclear@4
|
66 printf("oculus device info:\n");
|
nuclear@4
|
67 printf(" name: %s\n", info.DisplayDeviceName);
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nuclear@4
|
68 printf(" ipd: %f\n", info.InterpupillaryDistance);
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nuclear@4
|
69 printf(" distortion: %f %f %f %f\n", info.DistortionK[0],
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nuclear@4
|
70 info.DistortionK[1], info.DistortionK[2], info.DistortionK[3]);
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nuclear@4
|
71 }
|
nuclear@1
|
72
|
nuclear@4
|
73 // calculate and store viewing parameters
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nuclear@4
|
74 vr_ctx.info.width = info.HResolution;
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nuclear@4
|
75 vr_ctx.info.height = info.VResolution;
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nuclear@4
|
76 vr_ctx.info.aspect = (float)vr_ctx.info.width / (float)vr_ctx.info.height;
|
nuclear@4
|
77
|
nuclear@4
|
78 vr_ctx.info.ipd = info.InterpupillaryDistance;
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nuclear@4
|
79 for(int i=0; i<4; i++) {
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nuclear@4
|
80 vr_ctx.info.distort[i] = info.DistortionK[i];
|
nuclear@4
|
81 }
|
nuclear@12
|
82
|
nuclear@14
|
83 Util::Render::StereoConfig stereohelp;
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nuclear@14
|
84 stereohelp.SetFullViewport(Util::Render::Viewport(0, 0, vr_ctx.info.width, vr_ctx.info.height));
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nuclear@14
|
85 stereohelp.SetStereoMode(Util::Render::Stereo_LeftRight_Multipass);
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nuclear@14
|
86 stereohelp.SetHMDInfo(info);
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nuclear@14
|
87 stereohelp.SetDistortionFitPointVP(-1.0, 0.0);
|
nuclear@14
|
88
|
nuclear@14
|
89 vr_ctx.info.scale = stereohelp.GetDistortionScale();
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nuclear@13
|
90
|
nuclear@13
|
91 float vhalfsz = vr_ctx.info.scale * info.VScreenSize * 0.5;
|
nuclear@13
|
92 vr_ctx.info.fov = 2.0 * atan(vhalfsz / info.EyeToScreenDistance);
|
nuclear@13
|
93
|
nuclear@13
|
94 vr_ctx.info.lens_center_offset = 0.5 - info.LensSeparationDistance / info.HScreenSize;
|
nuclear@13
|
95
|
nuclear@13
|
96 // calculate center of projection shift to match the lens positions
|
nuclear@13
|
97 float center_dist_meters = info.HScreenSize * 0.25;
|
nuclear@13
|
98 float proj_shift = center_dist_meters - info.LensSeparationDistance * 0.5;
|
nuclear@13
|
99 vr_ctx.info.proj_center_offset = 4.0 * proj_shift / info.HScreenSize;
|
nuclear@15
|
100
|
nuclear@16
|
101 // grab the display info
|
nuclear@15
|
102 vr_ctx.info.display = new char[strlen(info.DisplayDeviceName) + 1];
|
nuclear@15
|
103 strcpy(vr_ctx.info.display, info.DisplayDeviceName);
|
nuclear@16
|
104
|
nuclear@16
|
105 vr_ctx.info.display_xoffs = info.DesktopX;
|
nuclear@16
|
106 vr_ctx.info.display_yoffs = info.DesktopY;
|
nuclear@16
|
107
|
nuclear@16
|
108 printf("display: \"%s\" offset: %+d %+d\n", vr_ctx.info.display,
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nuclear@16
|
109 vr_ctx.info.display_xoffs, vr_ctx.info.display_yoffs);
|
nuclear@1
|
110 }
|
nuclear@1
|
111
|
nuclear@1
|
112 // get the sensor device
|
nuclear@4
|
113 if(vr_ctx.ovr_hmd_dev) {
|
nuclear@4
|
114 if(!(vr_ctx.ovr_sensor_dev = vr_ctx.ovr_hmd_dev->GetSensor())) {
|
nuclear@4
|
115 fprintf(stderr, "failed to get oculus sensor device\n");
|
nuclear@4
|
116 }
|
nuclear@4
|
117 } else {
|
nuclear@4
|
118 if(!(vr_ctx.ovr_sensor_dev = vr_ctx.ovr_devman->EnumerateDevices<SensorDevice>().CreateDevice())) {
|
nuclear@4
|
119 fprintf(stderr, "failed to get oculus sensor device\n");
|
nuclear@4
|
120 }
|
nuclear@1
|
121 }
|
nuclear@1
|
122
|
nuclear@4
|
123 if(vr_ctx.ovr_sensor_dev) {
|
nuclear@4
|
124 SensorInfo sinfo;
|
nuclear@4
|
125 if(vr_ctx.ovr_sensor_dev->GetDeviceInfo(&sinfo)) {
|
nuclear@4
|
126 printf("oculus sensor device info:\n");
|
nuclear@4
|
127 printf(" name: %s\n", sinfo.ProductName);
|
nuclear@4
|
128 }
|
nuclear@4
|
129
|
nuclear@4
|
130 vr_ctx.ovr_sfusion.AttachToSensor(vr_ctx.ovr_sensor_dev);
|
nuclear@1
|
131 }
|
nuclear@1
|
132 return true;
|
nuclear@1
|
133 }
|
nuclear@3
|
134
|
nuclear@13
|
135 #define EXTERNAL_SHADER
|
nuclear@13
|
136
|
nuclear@12
|
137 static bool init_sdr()
|
nuclear@12
|
138 {
|
nuclear@12
|
139 int status;
|
nuclear@12
|
140
|
nuclear@13
|
141 #ifdef EXTERNAL_SHADER
|
nuclear@13
|
142 FILE *fp = fopen("sdr.glsl", "rb");
|
nuclear@13
|
143 if(!fp) {
|
nuclear@13
|
144 perror("failed to load sdr.glsl");
|
nuclear@13
|
145 return false;
|
nuclear@13
|
146 }
|
nuclear@13
|
147 fseek(fp, 0, SEEK_END);
|
nuclear@13
|
148 long sz = ftell(fp);
|
nuclear@13
|
149 rewind(fp);
|
nuclear@13
|
150
|
nuclear@13
|
151 char *buf = (char*)alloca(sz + 1);
|
nuclear@13
|
152 fread(buf, 1, sz, fp);
|
nuclear@13
|
153 buf[sz] = 0;
|
nuclear@13
|
154 sdr_src = buf;
|
nuclear@13
|
155
|
nuclear@13
|
156 fclose(fp);
|
nuclear@13
|
157 #endif
|
nuclear@13
|
158
|
nuclear@12
|
159 unsigned int sdr = glCreateShader(GL_FRAGMENT_SHADER);
|
nuclear@12
|
160 glShaderSource(sdr, 1, &sdr_src, 0);
|
nuclear@12
|
161 glCompileShader(sdr);
|
nuclear@12
|
162 glGetShaderiv(sdr, GL_COMPILE_STATUS, &status);
|
nuclear@12
|
163 if(!status) {
|
nuclear@12
|
164 fprintf(stderr, "failed to compile distortion shader\n");
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nuclear@14
|
165
|
nuclear@14
|
166 int loglen;
|
nuclear@14
|
167 glGetShaderiv(sdr, GL_INFO_LOG_LENGTH, &loglen);
|
nuclear@14
|
168
|
nuclear@14
|
169 if(loglen > 0) {
|
nuclear@14
|
170 char *log = (char*)alloca(loglen);
|
nuclear@14
|
171 glGetShaderInfoLog(sdr, loglen, &loglen, log);
|
nuclear@14
|
172 fprintf(stderr, "%s\n", log);
|
nuclear@14
|
173 }
|
nuclear@14
|
174
|
nuclear@12
|
175 return false;
|
nuclear@12
|
176 }
|
nuclear@12
|
177
|
nuclear@12
|
178 sdrprog = glCreateProgram();
|
nuclear@12
|
179 glAttachShader(sdrprog, sdr);
|
nuclear@12
|
180 glLinkProgram(sdrprog);
|
nuclear@12
|
181 if(!status) {
|
nuclear@12
|
182 fprintf(stderr, "failed to link distortion shader program\n");
|
nuclear@12
|
183 glDeleteShader(sdr);
|
nuclear@12
|
184 return false;
|
nuclear@12
|
185 }
|
nuclear@12
|
186
|
nuclear@12
|
187 int loc;
|
nuclear@12
|
188
|
nuclear@12
|
189 glUseProgram(sdrprog);
|
nuclear@12
|
190
|
nuclear@12
|
191 if((loc = glGetUniformLocation(sdrprog, "tex")) != -1) {
|
nuclear@12
|
192 glUniform1i(loc, 0);
|
nuclear@12
|
193 }
|
nuclear@13
|
194 if((loc = glGetUniformLocation(sdrprog, "lens_center_offset")) != -1) {
|
nuclear@13
|
195 glUniform1f(loc, 0);
|
nuclear@12
|
196 }
|
nuclear@12
|
197 if((loc = glGetUniformLocation(sdrprog, "scr_center")) != -1) {
|
nuclear@12
|
198 glUniform2f(loc, 0, 0);
|
nuclear@12
|
199 }
|
nuclear@12
|
200 if((loc = glGetUniformLocation(sdrprog, "scale")) != -1) {
|
nuclear@13
|
201 glUniform1f(loc, vr_ctx.info.scale);
|
nuclear@13
|
202 }
|
nuclear@13
|
203 if((loc = glGetUniformLocation(sdrprog, "aspect")) != -1) {
|
nuclear@13
|
204 printf("setting aspect: %f\n", vr_ctx.info.aspect / 2.0);
|
nuclear@13
|
205 glUniform1f(loc, vr_ctx.info.aspect / 2.0);
|
nuclear@12
|
206 }
|
nuclear@12
|
207 if((loc = glGetUniformLocation(sdrprog, "scale_in")) != -1) {
|
nuclear@12
|
208 glUniform2f(loc, 1, 1);
|
nuclear@12
|
209 }
|
nuclear@13
|
210 if((loc = glGetUniformLocation(sdrprog, "dist_factors")) != -1) {
|
nuclear@12
|
211 glUniform4f(loc, vr_ctx.info.distort[0], vr_ctx.info.distort[1],
|
nuclear@12
|
212 vr_ctx.info.distort[2], vr_ctx.info.distort[3]);
|
nuclear@12
|
213 }
|
nuclear@12
|
214
|
nuclear@12
|
215 return true;
|
nuclear@12
|
216 }
|
nuclear@12
|
217
|
nuclear@16
|
218 extern "C" const char *vr_get_display_name(void)
|
nuclear@16
|
219 {
|
nuclear@16
|
220 return vr_ctx.info.display;
|
nuclear@16
|
221 }
|
nuclear@16
|
222
|
nuclear@16
|
223 extern "C" void vr_get_display_pos(int *xptr, int *yptr)
|
nuclear@16
|
224 {
|
nuclear@16
|
225 *xptr = vr_ctx.info.display_xoffs;
|
nuclear@16
|
226 *yptr = vr_ctx.info.display_yoffs;
|
nuclear@16
|
227 }
|
nuclear@16
|
228
|
nuclear@3
|
229 extern "C" int vr_get_width(void)
|
nuclear@3
|
230 {
|
nuclear@3
|
231 return vr_ctx.info.width;
|
nuclear@3
|
232 }
|
nuclear@3
|
233
|
nuclear@3
|
234 extern "C" int vr_get_height(void)
|
nuclear@3
|
235 {
|
nuclear@3
|
236 return vr_ctx.info.height;
|
nuclear@3
|
237 }
|
nuclear@3
|
238
|
nuclear@3
|
239 extern "C" float vr_get_fov(void)
|
nuclear@3
|
240 {
|
nuclear@3
|
241 return vr_ctx.info.fov;
|
nuclear@3
|
242 }
|
nuclear@3
|
243
|
nuclear@3
|
244 extern "C" float vr_get_aspect(void)
|
nuclear@3
|
245 {
|
nuclear@3
|
246 return vr_ctx.info.aspect;
|
nuclear@3
|
247 }
|
nuclear@3
|
248
|
nuclear@3
|
249 extern "C" void vr_set_eyedist(float ipd)
|
nuclear@3
|
250 {
|
nuclear@3
|
251 vr_ctx.info.ipd = ipd;
|
nuclear@3
|
252 }
|
nuclear@3
|
253
|
nuclear@3
|
254 extern "C" float vr_get_eyedist(void)
|
nuclear@3
|
255 {
|
nuclear@3
|
256 return vr_ctx.info.ipd;
|
nuclear@3
|
257 }
|
nuclear@3
|
258
|
nuclear@3
|
259 extern "C" void vr_set_distort(const float *coef)
|
nuclear@3
|
260 {
|
nuclear@3
|
261 memcpy(vr_ctx.info.distort, coef, sizeof vr_ctx.info.distort);
|
nuclear@3
|
262 }
|
nuclear@3
|
263
|
nuclear@3
|
264 extern "C" void vr_get_distort(float *coef)
|
nuclear@3
|
265 {
|
nuclear@3
|
266 memcpy(coef, vr_ctx.info.distort, sizeof vr_ctx.info.distort);
|
nuclear@3
|
267 }
|
nuclear@3
|
268
|
nuclear@3
|
269 extern "C" void vr_set_prediction_sec(float dt)
|
nuclear@3
|
270 {
|
nuclear@3
|
271 vr_ctx.ovr_sfusion.SetPrediction(dt);
|
nuclear@3
|
272 }
|
nuclear@3
|
273
|
nuclear@3
|
274 extern "C" float vr_get_prediction_sec(void)
|
nuclear@3
|
275 {
|
nuclear@3
|
276 return vr_ctx.ovr_sfusion.GetPredictionDelta();
|
nuclear@3
|
277 }
|
nuclear@3
|
278
|
nuclear@13
|
279 extern "C" void vr_get_view_matrix(float *res, int eye)
|
nuclear@13
|
280 {
|
nuclear@13
|
281 // TODO
|
nuclear@13
|
282 }
|
nuclear@13
|
283
|
nuclear@13
|
284 extern "C" void vr_get_proj_matrix(float *res, int eye)
|
nuclear@13
|
285 {
|
nuclear@13
|
286 static float eye_scale[] = {0.0, 1.0, -1.0};
|
nuclear@13
|
287
|
nuclear@13
|
288 Matrix4f proj = Matrix4f::PerspectiveRH(vr_ctx.info.fov, vr_ctx.info.aspect / 2.0, 0.3, 1000.0);
|
nuclear@13
|
289 proj = Matrix4f::Translation(vr_ctx.info.proj_center_offset * eye_scale[eye], 0, 0) * proj;
|
nuclear@13
|
290
|
nuclear@13
|
291 memcpy(res, proj.M[0], 16 * sizeof(float));
|
nuclear@13
|
292 }
|
nuclear@13
|
293
|
nuclear@3
|
294 extern "C" void vr_get_translation(float *offs)
|
nuclear@3
|
295 {
|
nuclear@3
|
296 // current oculus devkit doesn't do translation
|
nuclear@3
|
297 offs[0] = offs[1] = offs[2] = 0.0f;
|
nuclear@3
|
298 }
|
nuclear@3
|
299
|
nuclear@3
|
300 extern "C" void vr_get_rotation(float *quat)
|
nuclear@3
|
301 {
|
nuclear@3
|
302 Quatf oq = vr_ctx.ovr_sfusion.GetPredictedOrientation();
|
nuclear@3
|
303 quat[0] = oq.x;
|
nuclear@3
|
304 quat[1] = oq.y;
|
nuclear@3
|
305 quat[2] = oq.z;
|
nuclear@3
|
306 quat[3] = oq.w;
|
nuclear@3
|
307 }
|
nuclear@3
|
308
|
nuclear@3
|
309 extern "C" void vr_get_rotation_euler(float *euler)
|
nuclear@3
|
310 {
|
nuclear@3
|
311 Quatf oq = vr_ctx.ovr_sfusion.GetPredictedOrientation();
|
nuclear@3
|
312 oq.GetEulerAngles<Axis_Y, Axis_X, Axis_Z>(euler + 1, euler, euler + 2);
|
nuclear@3
|
313 }
|
nuclear@12
|
314
|
nuclear@12
|
315 extern "C" void vr_draw_eye(unsigned int tex, int eye)
|
nuclear@12
|
316 {
|
nuclear@12
|
317 static const float rects[3][4] = {
|
nuclear@12
|
318 {-1, -1, 1, 1},
|
nuclear@12
|
319 {-1, -1, 0, 1},
|
nuclear@12
|
320 {0, -1, 1, 1}
|
nuclear@12
|
321 };
|
nuclear@12
|
322 static const float offs_scale[3] = {0.0, -1.0, 1.0};
|
nuclear@12
|
323
|
nuclear@12
|
324 glPushAttrib(GL_ENABLE_BIT);
|
nuclear@12
|
325 glDisable(GL_DEPTH_TEST);
|
nuclear@12
|
326 glDisable(GL_LIGHTING);
|
nuclear@12
|
327 glEnable(GL_TEXTURE_2D);
|
nuclear@12
|
328
|
nuclear@12
|
329 glMatrixMode(GL_MODELVIEW);
|
nuclear@12
|
330 glPushMatrix();
|
nuclear@12
|
331 glLoadIdentity();
|
nuclear@12
|
332
|
nuclear@12
|
333 glMatrixMode(GL_PROJECTION);
|
nuclear@12
|
334 glPushMatrix();
|
nuclear@12
|
335 glLoadIdentity();
|
nuclear@12
|
336
|
nuclear@12
|
337 glUseProgram(sdrprog);
|
nuclear@12
|
338
|
nuclear@13
|
339 if(sdrprog) {
|
nuclear@13
|
340 int loc;
|
nuclear@13
|
341 if((loc = glGetUniformLocation(sdrprog, "lens_center_offset")) != -1) {
|
nuclear@13
|
342 float offset = vr_ctx.info.lens_center_offset * offs_scale[eye];
|
nuclear@13
|
343 glUniform1f(loc, offset);
|
nuclear@13
|
344 }
|
nuclear@12
|
345 }
|
nuclear@12
|
346
|
nuclear@12
|
347 glBindTexture(GL_TEXTURE_2D, tex);
|
nuclear@12
|
348 glBegin(GL_QUADS);
|
nuclear@12
|
349 glColor4f(1, 1, 1, 1);
|
nuclear@12
|
350 glTexCoord2f(0, 0); glVertex2f(rects[eye][0], rects[eye][1]);
|
nuclear@12
|
351 glTexCoord2f(1, 0); glVertex2f(rects[eye][2], rects[eye][1]);
|
nuclear@12
|
352 glTexCoord2f(1, 1); glVertex2f(rects[eye][2], rects[eye][3]);
|
nuclear@12
|
353 glTexCoord2f(0, 1); glVertex2f(rects[eye][0], rects[eye][3]);
|
nuclear@12
|
354 glEnd();
|
nuclear@12
|
355
|
nuclear@12
|
356 glUseProgram(0);
|
nuclear@12
|
357
|
nuclear@12
|
358 glPopMatrix();
|
nuclear@12
|
359 glMatrixMode(GL_MODELVIEW);
|
nuclear@12
|
360 glPopMatrix();
|
nuclear@12
|
361
|
nuclear@12
|
362 glPopAttrib();
|
nuclear@12
|
363 }
|