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annotate src/solar-system.cpp @ 2:c24af3462002

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initial commit
author Eris Caffee <discordia@eldalin.com>
date Sat, 27 Apr 2013 13:22:17 -0500
parents
children 4f8b47ac2715 7ae4ee5c27f8
rev   line source
discordia@2 1 #include <GLTools.h>
discordia@2 2 #include <GLShaderManager.h>
discordia@2 3 #include <GLFrustum.h>
discordia@2 4 #include <GLBatch.h>
discordia@2 5 #include <GLFrame.h>
discordia@2 6 #include <GLMatrixStack.h>
discordia@2 7 #include <GLGeometryTransform.h>
discordia@2 8 #include <StopWatch.h>
discordia@2 9
discordia@2 10 #include <math.h>
discordia@2 11 #include <ctype.h>
discordia@2 12 #include <stdlib.h>
discordia@2 13 #include <string.h>
discordia@2 14
discordia@2 15 #include <dirent.h>
discordia@2 16
discordia@2 17 #include <GL/glut.h>
discordia@2 18 #include <GL/glx.h>
discordia@2 19
discordia@2 20 GLShaderManager shaderManager;
discordia@2 21 GLMatrixStack modelViewMatrix;
discordia@2 22 GLMatrixStack projectionMatrix;
discordia@2 23 GLFrustum viewFrustum;
discordia@2 24 GLGeometryTransform transformPipeline;
discordia@2 25
discordia@2 26 GLFrame cameraFrame;
discordia@2 27
discordia@2 28 GLenum polymode = GL_FILL;
discordia@2 29
discordia@2 30 int width = 800;
discordia@2 31 int height = 600;
discordia@2 32 int fullscreen = 0;
discordia@2 33
discordia@2 34 #define NUM_SPHERES 50
discordia@2 35 GLFrame spheres[NUM_SPHERES];
discordia@2 36
discordia@2 37 GLTriangleBatch jupiterBatch;
discordia@2 38 GLTriangleBatch sphereBatch;
discordia@2 39 GLTriangleBatch earthBatch;
discordia@2 40 GLTriangleBatch moonBatch;
discordia@2 41 GLTriangleBatch sunBatch;
discordia@2 42 GLBatch floorBatch;
discordia@2 43
discordia@2 44 #define TEX_EARTH 1
discordia@2 45 #define TEX_MOON 2
discordia@2 46 #define TEX_JUPITER 3
discordia@2 47 #define TEX_SUN 4
discordia@2 48 #define NUM_TEXTURES 5
discordia@2 49 GLuint uiTextures[NUM_TEXTURES];
discordia@2 50
discordia@2 51 ////////////////////////////////////////////////////////////////////////////////
discordia@2 52 #define SCREENSHOT_FILENAME_BASE "screenshot-"
discordia@2 53 #define SCREENSHOT_FILENAME_BASELEN 11
discordia@2 54 #define SCREENSHOT_FILENAME_EXT ".tga"
discordia@2 55 #define SCREENSHOT_FILENAME_EXTLEN 4
discordia@2 56
discordia@2 57 int scandir_filter(const struct dirent * d)
discordia@2 58 {
discordia@2 59 if (memcmp(d->d_name, SCREENSHOT_FILENAME_BASE,
discordia@2 60 SCREENSHOT_FILENAME_BASELEN) != 0) return 0;
discordia@2 61 if (memcmp(d->d_name+SCREENSHOT_FILENAME_BASELEN+3,
discordia@2 62 SCREENSHOT_FILENAME_EXT, SCREENSHOT_FILENAME_EXTLEN) != 0)
discordia@2 63 return 0;
discordia@2 64 if (isdigit(d->d_name[SCREENSHOT_FILENAME_BASELEN])
discordia@2 65 && isdigit(d->d_name[SCREENSHOT_FILENAME_BASELEN+1])
discordia@2 66 && isdigit(d->d_name[SCREENSHOT_FILENAME_BASELEN+2]))
discordia@2 67 return 1;
discordia@2 68 return 0;
discordia@2 69 }
discordia@2 70
discordia@2 71
discordia@2 72 int get_next_file_name(char * filename)
discordia@2 73 {
discordia@2 74 static int i = 0;
discordia@2 75
discordia@2 76 if (i == 0)
discordia@2 77 {
discordia@2 78 char pattern[SCREENSHOT_FILENAME_BASELEN+3+SCREENSHOT_FILENAME_EXTLEN];
discordia@2 79 struct dirent ** file_list;
discordia@2 80 int num_files = scandir(".", &file_list, scandir_filter, alphasort);
discordia@2 81 if (num_files != 0)
discordia@2 82 sprintf(pattern, "%s%%03d%s", SCREENSHOT_FILENAME_BASE,
discordia@2 83 SCREENSHOT_FILENAME_EXT);
discordia@2 84 sscanf(file_list[num_files-1]->d_name, pattern, &i);
discordia@2 85 }
discordia@2 86 i++;
discordia@2 87
discordia@2 88 sprintf(filename, "%s%03d%s", SCREENSHOT_FILENAME_BASE, i,
discordia@2 89 SCREENSHOT_FILENAME_EXT);
discordia@2 90 return i;
discordia@2 91 }
discordia@2 92
discordia@2 93 ////////////////////////////////////////////////////////////////////////////////
discordia@2 94 bool LoadTGATexture(const char * szFileName, GLenum minFilter,
discordia@2 95 GLenum magFilter, GLenum wrapMode)
discordia@2 96 {
discordia@2 97 GLbyte * pBits;
discordia@2 98 int nWidth, nHeight, nComponents;
discordia@2 99 GLenum eFormat;
discordia@2 100
discordia@2 101 pBits = gltReadTGABits(szFileName, &nWidth, &nHeight, &nComponents, &eFormat);
discordia@2 102 if (pBits == NULL)
discordia@2 103 {
discordia@2 104 fprintf(stderr, "Failed to load %s\n", szFileName);
discordia@2 105 exit(EXIT_FAILURE);
discordia@2 106 }
discordia@2 107
discordia@2 108 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapMode);
discordia@2 109 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapMode);
discordia@2 110
discordia@2 111 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
discordia@2 112 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
discordia@2 113
discordia@2 114 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
discordia@2 115 glTexImage2D(GL_TEXTURE_2D, 0, nComponents, nWidth, nHeight, 0,
discordia@2 116 eFormat, GL_UNSIGNED_BYTE, pBits);
discordia@2 117
discordia@2 118 free(pBits);
discordia@2 119
discordia@2 120 if (minFilter == GL_LINEAR_MIPMAP_LINEAR ||
discordia@2 121 minFilter == GL_LINEAR_MIPMAP_NEAREST ||
discordia@2 122 minFilter == GL_NEAREST_MIPMAP_LINEAR ||
discordia@2 123 minFilter == GL_NEAREST_MIPMAP_NEAREST)
discordia@2 124 {
discordia@2 125 glGenerateMipmap(GL_TEXTURE_2D);
discordia@2 126 }
discordia@2 127
discordia@2 128 return true;
discordia@2 129 }
discordia@2 130
discordia@2 131 ////////////////////////////////////////////////////////////////////////////////
discordia@2 132 void DrawSolarSystem(GLfloat yRot)
discordia@2 133 {
discordia@2 134 static GLfloat vWhite[] = { 1.0f, 1.0f, 1.0f, 1.0f };
discordia@2 135 static GLfloat vLightPos[] = { 0.0f, 0.0f, 0.0f, 1.0f };
discordia@2 136 static M3DVector3f vSunPos = { 0.0f, 0.0f, 0.0f };
discordia@2 137 static M3DVector3f vEarthPos = { 5.0f, 0.0f, 0.0f };
discordia@2 138 static M3DVector3f vJupiterPos = { 10.0f, 0.0f, 0.0f };
discordia@2 139
discordia@2 140 float RotScale = 100.0;
discordia@2 141 float SunRotSpeed = 1.0/(25*24) * RotScale;
discordia@2 142
discordia@2 143 float JupiterRotSpeed = 1.0/9 * RotScale;
discordia@2 144 float JupiterAxialTilt = 3.13;
discordia@2 145
discordia@2 146 float EarthRotSpeed = 1.0/24 * RotScale;
discordia@2 147 float EarthAxialTilt = 23.5;
discordia@2 148
discordia@2 149 float MoonRotSpeed = 1.0/29.5 * RotScale;
discordia@2 150 float MoonAxialTilt = 6.7;
discordia@2 151 float MoonOrbitSpeed = 1.0/29.5 * RotScale;
discordia@2 152 float MoonOrbitTilt = 5.145;
discordia@2 153
discordia@2 154 static CStopWatch rotTimer;
discordia@2 155
discordia@2 156 // Get the light position in eye space
discordia@2 157 M3DVector4f vLightTransformed;
discordia@2 158 M3DMatrix44f mCamera;
discordia@2 159 modelViewMatrix.GetMatrix(mCamera);
discordia@2 160 m3dTransformVector4(vLightTransformed, vLightPos, mCamera);
discordia@2 161
discordia@2 162
discordia@2 163 ////////////////////////////////
discordia@2 164 // Begin Sun
discordia@2 165
discordia@2 166 float SunRot = rotTimer.GetElapsedSeconds() * SunRotSpeed;
discordia@2 167
discordia@2 168 modelViewMatrix.PushMatrix();
discordia@2 169
discordia@2 170 modelViewMatrix.Translatev(vSunPos);
discordia@2 171 // North is up!
discordia@2 172 modelViewMatrix.Rotate(-90.0f, 1.0f, 0.0f, 0.0f);
discordia@2 173 // Rotate on axis
discordia@2 174 modelViewMatrix.Rotate(SunRot, 0.0f, 0.0f, 1.0f);
discordia@2 175
discordia@2 176 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_SUN]);
discordia@2 177 if (polymode == GL_FILL)
discordia@2 178 {
discordia@2 179 shaderManager.UseStockShader(GLT_SHADER_TEXTURE_REPLACE,
discordia@2 180 transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 181 0);
discordia@2 182 }
discordia@2 183 else
discordia@2 184 {
discordia@2 185 shaderManager.UseStockShader(GLT_SHADER_FLAT,
discordia@2 186 transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 187 vWhite);
discordia@2 188 }
discordia@2 189 sunBatch.Draw();
discordia@2 190 modelViewMatrix.PopMatrix();
discordia@2 191 // End Sun
discordia@2 192 /////////////////////////////////
discordia@2 193
discordia@2 194
discordia@2 195 ////////////////////////////////
discordia@2 196 // Jupiter
discordia@2 197 float JupiterRot = rotTimer.GetElapsedSeconds() * JupiterRotSpeed;
discordia@2 198
discordia@2 199 modelViewMatrix.PushMatrix();
discordia@2 200 modelViewMatrix.Translatev(vJupiterPos);
discordia@2 201 // North is up!
discordia@2 202 modelViewMatrix.Rotate(-90.0f - JupiterAxialTilt, 1.0f, 0.0f, 0.0f);
discordia@2 203 // Rotate on axis
discordia@2 204 modelViewMatrix.Rotate(JupiterRot, 0.0f, 0.0f, 1.0f);
discordia@2 205
discordia@2 206 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_JUPITER]);
discordia@2 207 if (polymode == GL_FILL)
discordia@2 208 {
discordia@2 209 // shaderManager.UseStockShader(GLT_SHADER_TEXTURE_REPLACE,
discordia@2 210 // transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 211 // 0);
discordia@2 212 shaderManager.UseStockShader(GLT_SHADER_TEXTURE_POINT_LIGHT_DIFF,
discordia@2 213 modelViewMatrix.GetMatrix(),
discordia@2 214 transformPipeline.GetProjectionMatrix(),
discordia@2 215 vLightTransformed,
discordia@2 216 vWhite,
discordia@2 217 0);
discordia@2 218 }
discordia@2 219 else
discordia@2 220 {
discordia@2 221 shaderManager.UseStockShader(GLT_SHADER_FLAT,
discordia@2 222 transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 223 vWhite);
discordia@2 224
discordia@2 225 }
discordia@2 226 jupiterBatch.Draw();
discordia@2 227 modelViewMatrix.PopMatrix();
discordia@2 228 // End Jupiter
discordia@2 229 ////////////////////////////////
discordia@2 230
discordia@2 231
discordia@2 232
discordia@2 233
discordia@2 234 /////////////////////////////////
discordia@2 235 // Begin Earth/Moon
discordia@2 236
discordia@2 237 // Begin Earth
discordia@2 238 float EarthRot = rotTimer.GetElapsedSeconds() * EarthRotSpeed;
discordia@2 239
discordia@2 240 modelViewMatrix.PushMatrix();
discordia@2 241 modelViewMatrix.Translatev(vEarthPos);
discordia@2 242 modelViewMatrix.PushMatrix(); // Save unrotated matrix for when we do the Moon
discordia@2 243
discordia@2 244 // NOrth is up!
discordia@2 245 modelViewMatrix.Rotate(-90.0f - EarthAxialTilt, 1.0f, 0.0f, 0.0f);
discordia@2 246 // Rotate on the axis
discordia@2 247 modelViewMatrix.Rotate(EarthRot, 0.0f, 0.0f, 1.0f);
discordia@2 248
discordia@2 249 if (polymode == GL_FILL)
discordia@2 250 {
discordia@2 251 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_EARTH]);
discordia@2 252 shaderManager.UseStockShader(GLT_SHADER_TEXTURE_POINT_LIGHT_DIFF,
discordia@2 253 modelViewMatrix.GetMatrix(),
discordia@2 254 transformPipeline.GetProjectionMatrix(),
discordia@2 255 vLightTransformed,
discordia@2 256 vWhite,
discordia@2 257 0);
discordia@2 258 }
discordia@2 259 else
discordia@2 260 {
discordia@2 261 shaderManager.UseStockShader(GLT_SHADER_FLAT,
discordia@2 262 transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 263 vWhite);
discordia@2 264
discordia@2 265 }
discordia@2 266 earthBatch.Draw();
discordia@2 267 modelViewMatrix.PopMatrix();
discordia@2 268
discordia@2 269 // Begin Moon
discordia@2 270
discordia@2 271
discordia@2 272 // orbit the Earth
discordia@2 273 modelViewMatrix.Rotate(MoonOrbitTilt, 0.0f, 0.0f, 1.0f);
discordia@2 274 // NOrth is up!
discordia@2 275 modelViewMatrix.Rotate(-90.0f - MoonAxialTilt, 0.0f, 1.0f, 0.0f);
discordia@2 276
discordia@2 277 float MoonRot = rotTimer.GetElapsedSeconds() * MoonOrbitSpeed * 10;
discordia@2 278 modelViewMatrix.Rotate(MoonRot, 0.0f, 1.0f, 0.0f);
discordia@2 279
discordia@2 280 modelViewMatrix.Translate(0.5f, 0.0f, 0.0f);
discordia@2 281
discordia@2 282
discordia@2 283 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_MOON]);
discordia@2 284 if (polymode == GL_FILL)
discordia@2 285 {
discordia@2 286 shaderManager.UseStockShader(GLT_SHADER_TEXTURE_POINT_LIGHT_DIFF,
discordia@2 287 modelViewMatrix.GetMatrix(),
discordia@2 288 transformPipeline.GetProjectionMatrix(),
discordia@2 289 vLightTransformed,
discordia@2 290 vWhite,
discordia@2 291 0);
discordia@2 292 }
discordia@2 293 else
discordia@2 294 {
discordia@2 295 shaderManager.UseStockShader(GLT_SHADER_FLAT,
discordia@2 296 transformPipeline.GetModelViewProjectionMatrix(),
discordia@2 297 vWhite);
discordia@2 298 }
discordia@2 299 moonBatch.Draw();
discordia@2 300 modelViewMatrix.PopMatrix();
discordia@2 301
discordia@2 302
discordia@2 303 modelViewMatrix.PopMatrix();
discordia@2 304 // End Earth/Moon
discordia@2 305 ////////////////////////////////
discordia@2 306
discordia@2 307 }
discordia@2 308
discordia@2 309 ////////////////////////////////////////////////////////////////////////////////
discordia@2 310 void RenderScene(void)
discordia@2 311 {
discordia@2 312 static CStopWatch rotTimer;
discordia@2 313 float yRot = - rotTimer.GetElapsedSeconds() * 60.0f;
discordia@2 314
discordia@2 315 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
discordia@2 316
discordia@2 317 // Begin Render
discordia@2 318 modelViewMatrix.PushMatrix();
discordia@2 319
discordia@2 320 // Begin Camera position
discordia@2 321 static M3DMatrix44f mCamera;
discordia@2 322 cameraFrame.GetCameraMatrix(mCamera);
discordia@2 323 modelViewMatrix.MultMatrix(mCamera);
discordia@2 324 // End Camera position
discordia@2 325
discordia@2 326 DrawSolarSystem(yRot);
discordia@2 327
discordia@2 328 // End Render
discordia@2 329 modelViewMatrix.PopMatrix();
discordia@2 330
discordia@2 331 glutSwapBuffers();
discordia@2 332 glutPostRedisplay();
discordia@2 333 }
discordia@2 334
discordia@2 335 ////////////////////////////////////////////////////////////////////////////////
discordia@2 336 void SetupRC()
discordia@2 337 {
discordia@2 338 shaderManager.InitializeStockShaders();
discordia@2 339 glEnable(GL_DEPTH_TEST);
discordia@2 340 glEnable(GL_CULL_FACE);
discordia@2 341 glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
discordia@2 342
discordia@2 343 gltMakeSphere(jupiterBatch, 0.5f, 128, 128 );
discordia@2 344 gltMakeSphere(earthBatch, 0.2f, 26, 26);
discordia@2 345 gltMakeSphere(moonBatch, 0.1f, 26, 26);
discordia@2 346 gltMakeSphere(sunBatch, 1.0f, 26, 26);
discordia@2 347
discordia@2 348 glGenTextures(NUM_TEXTURES, uiTextures);
discordia@2 349
discordia@2 350 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_EARTH]);
discordia@2 351 LoadTGATexture("../textures/earth.tga", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE);
discordia@2 352
discordia@2 353 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_MOON]);
discordia@2 354 LoadTGATexture("../textures/moon.tga", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE);
discordia@2 355
discordia@2 356 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_JUPITER]);
discordia@2 357 LoadTGATexture("../textures/jupiter.tga", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE);
discordia@2 358
discordia@2 359 glBindTexture(GL_TEXTURE_2D, uiTextures[TEX_SUN]);
discordia@2 360 LoadTGATexture("../textures/sun.tga", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, GL_CLAMP_TO_EDGE);
discordia@2 361
discordia@2 362 static M3DMatrix44f mCamera;
discordia@2 363 cameraFrame.GetCameraMatrix(mCamera);
discordia@2 364 cameraFrame.MoveForward(-10.0);
discordia@2 365 // cameraFrame.RotateWorld(15.0, 0.0f, 1.0f, 0.0f);
discordia@2 366 }
discordia@2 367
discordia@2 368 ////////////////////////////////////////////////////////////////////////////////
discordia@2 369 void ShutDownRC(void)
discordia@2 370 {
discordia@2 371 glDeleteTextures(NUM_TEXTURES, uiTextures);
discordia@2 372 }
discordia@2 373
discordia@2 374 ////////////////////////////////////////////////////////////////////////////////
discordia@2 375 void ChangeSize(int nWidth, int nHeight)
discordia@2 376 {
discordia@2 377 if (nHeight == 0)
discordia@2 378 {
discordia@2 379 nHeight = 1;
discordia@2 380 }
discordia@2 381 glViewport(0,0,nWidth, nHeight);
discordia@2 382 viewFrustum.SetPerspective(35.0f, float(nWidth)/float(nHeight), 1.0f, 100.0f);
discordia@2 383 projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix());
discordia@2 384 transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix);
discordia@2 385 }
discordia@2 386
discordia@2 387 ////////////////////////////////////////////////////////////////////////////////
discordia@2 388 void SpecialKeys(int key, int x, int y)
discordia@2 389 {
discordia@2 390 }
discordia@2 391
discordia@2 392 ////////////////////////////////////////////////////////////////////////////////
discordia@2 393 void KeyboardFunc(unsigned char key, int x, int y)
discordia@2 394 {
discordia@2 395 static int changed;
discordia@2 396 static float linear = 0.1f;
discordia@2 397
discordia@2 398 changed = 0;
discordia@2 399
discordia@2 400 if ('w' == key)
discordia@2 401 {
discordia@2 402 cameraFrame.MoveForward(linear);
discordia@2 403 changed = 1;
discordia@2 404 }
discordia@2 405 else if ('W' == key)
discordia@2 406 {
discordia@2 407 cameraFrame.MoveForward(10*linear);
discordia@2 408 changed = 1;
discordia@2 409 }
discordia@2 410 else if ('s' == key)
discordia@2 411 {
discordia@2 412 cameraFrame.MoveForward(-linear);
discordia@2 413 changed = 1;
discordia@2 414 }
discordia@2 415 else if ('S' == key)
discordia@2 416 {
discordia@2 417 cameraFrame.MoveForward(-10*linear);
discordia@2 418 changed = 1;
discordia@2 419 }
discordia@2 420 else if ('a' == key)
discordia@2 421 {
discordia@2 422 cameraFrame.MoveRight(linear);
discordia@2 423 changed = 1;
discordia@2 424 }
discordia@2 425 else if ('A' == key)
discordia@2 426 {
discordia@2 427 cameraFrame.MoveRight(10*linear);
discordia@2 428 changed = 1;
discordia@2 429 }
discordia@2 430 else if ('d' == key)
discordia@2 431 {
discordia@2 432 cameraFrame.MoveRight(-linear);
discordia@2 433 changed = 1;
discordia@2 434 }
discordia@2 435 else if ('D' == key)
discordia@2 436 {
discordia@2 437 cameraFrame.MoveRight(-10*linear);
discordia@2 438 changed = 1;
discordia@2 439 }
discordia@2 440
discordia@2 441 else if ('q' == key)
discordia@2 442 {
discordia@2 443 exit(0);
discordia@2 444 }
discordia@2 445 else if ('f' == key)
discordia@2 446 {
discordia@2 447 if (fullscreen)
discordia@2 448 {
discordia@2 449 glutReshapeWindow(width, height);
discordia@2 450 fullscreen = 0;
discordia@2 451 }
discordia@2 452 else
discordia@2 453 {
discordia@2 454 width = glutGet(GLUT_WINDOW_WIDTH);
discordia@2 455 height = glutGet(GLUT_WINDOW_HEIGHT);
discordia@2 456 glutFullScreen();
discordia@2 457 fullscreen = 1;
discordia@2 458 }
discordia@2 459 }
discordia@2 460 else if ('o' == key)
discordia@2 461 {
discordia@2 462 // 'o' for 'outline' - toggle wireframe rendering
discordia@2 463 polymode = (polymode == GL_FILL) ? GL_LINE : GL_FILL;
discordia@2 464 glPolygonMode(GL_FRONT_AND_BACK, polymode);
discordia@2 465 }
discordia@2 466 else if ('p' == key)
discordia@2 467 {
discordia@2 468 // 'p' for 'print screen' - save a screenshot
discordia@2 469 char filename[20];
discordia@2 470 get_next_file_name(filename);
discordia@2 471
discordia@2 472 gltGrabScreenTGA(filename);
discordia@2 473 }
discordia@2 474
discordia@2 475 if (changed)
discordia@2 476 {
discordia@2 477 glutPostRedisplay();
discordia@2 478 }
discordia@2 479 }
discordia@2 480
discordia@2 481 ////////////////////////////////////////////////////////////////////////////////
discordia@2 482 void MouseMotionFunc (int x, int y)
discordia@2 483 {
discordia@2 484 static float angular = (float) m3dDegToRad(0.5f);
discordia@2 485 static int xx = -1;
discordia@2 486 static int yy = -1;
discordia@2 487
discordia@2 488 if (-1 == xx)
discordia@2 489 {
discordia@2 490 xx = x;
discordia@2 491 yy = y;
discordia@2 492 }
discordia@2 493
discordia@2 494 if ((0 == x) || (x < xx))
discordia@2 495 {
discordia@2 496 cameraFrame.RotateWorld(angular, 0.0f, 1.0f, 0.0f);
discordia@2 497 glutPostRedisplay();
discordia@2 498 }
discordia@2 499 else if ((x == glutGet(GLUT_WINDOW_WIDTH) -1) || (x > xx))
discordia@2 500 {
discordia@2 501 cameraFrame.RotateWorld(-angular, 0.0f, 1.0f, 0.0f);
discordia@2 502 glutPostRedisplay();
discordia@2 503 }
discordia@2 504 // Hmm. Need to transform normal vector, don't I?
discordia@2 505 // if ((0 == y) || (y < yy))
discordia@2 506 // {
discordia@2 507 // cameraFrame.RotateWorld(angular, 1.0f, 0.0f, 0.0f);
discordia@2 508 // }
discordia@2 509 // else if ((y == glutGet(GLUT_WINDOW_HEIGHT) -1) || (y > yy))
discordia@2 510 // {
discordia@2 511 // cameraFrame.RotateWorld(-angular, 1.0f, 0.0f, 0.0f);
discordia@2 512 // }
discordia@2 513
discordia@2 514 xx = x;
discordia@2 515 yy = y;
discordia@2 516 }
discordia@2 517
discordia@2 518 ////////////////////////////////////////////////////////////////////////////////
discordia@2 519 int main (int argc, char * argv[])
discordia@2 520 {
discordia@2 521 gltSetWorkingDirectory(argv[0]);
discordia@2 522 glutInit(&argc, argv);
discordia@2 523 glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL);
discordia@2 524 glutInitWindowSize(800, 600);
discordia@2 525 glutCreateWindow("OpenGL SphereWorld");
discordia@2 526
discordia@2 527 glutReshapeFunc(ChangeSize);
discordia@2 528 glutDisplayFunc(RenderScene);
discordia@2 529 glutSpecialFunc(SpecialKeys);
discordia@2 530 glutKeyboardFunc(KeyboardFunc);
discordia@2 531 glutMotionFunc(MouseMotionFunc);
discordia@2 532 glutPassiveMotionFunc(MouseMotionFunc);
discordia@2 533 glutSetCursor(GLUT_CURSOR_NONE);
discordia@2 534
discordia@2 535 GLenum err = glewInit();
discordia@2 536 if (GLEW_OK != err)
discordia@2 537 {
discordia@2 538 fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
discordia@2 539 return 1;
discordia@2 540 }
discordia@2 541
discordia@2 542 // This enabled vertical sync on Linux
discordia@2 543 // For full generality I should use Glew and check what OS I'm on.
discordia@2 544 // Note that the ATI Catalyst driver exports the WGL_EXT_swap_control
discordia@2 545 // extension name instead of SGI_swap_control as it should.
discordia@2 546 // but nonetheless the actual function provided is glXSwapIntervalSGI
discordia@2 547
discordia@2 548 PFNGLXSWAPINTERVALSGIPROC SwapInterval;
discordia@2 549 SwapInterval = (PFNGLXSWAPINTERVALSGIPROC)glXGetProcAddress((const GLubyte*)"glXSwapIntervalSGI");
discordia@2 550
discordia@2 551 if (SwapInterval)
discordia@2 552 SwapInterval(1);
discordia@2 553
discordia@2 554 SetupRC();
discordia@2 555 glutMainLoop();
discordia@2 556 ShutDownRC();
discordia@2 557
discordia@2 558 return 0;
discordia@2 559 }
discordia@2 560
discordia@2 561
discordia@2 562
discordia@2 563
discordia@2 564