#include <math.h>
#include <stdlib.h>
#include <GL/glut.h>
+#include "readtex.h"
-#define FALSE 0
-#define TRUE 1
#ifndef PI
#define PI 3.14159265358979323846
#endif
-#include "loadppm.c"
-
-int rgb; /* unused */
-
-#include "tkmap.c"
-
GLenum doubleBuffer;
int W = 400, H = 400;
-char *imageFileName = 0;
-PPMImage *image;
-
-int numComponents;
+char *imageFileName = "../images/reflect.rgb";
float *minFilter, *magFilter, *sWrapMode, *tWrapMode;
float decal[] = {GL_DECAL};
GLint sphereMap[] = {GL_SPHERE_MAP};
float xRotation = 0.0, yRotation = 0.0;
-float zTranslate = -4.0;
-GLenum autoRotate = TRUE;
-GLenum deepestColor = COLOR_GREEN;
-GLenum isLit = TRUE;
-GLenum isFogged = FALSE;
+float zTranslate = -3.0;
+GLenum autoRotate = GL_TRUE;
+GLboolean isLit = GL_TRUE;
+GLboolean isFogged = GL_FALSE;
+GLboolean doTexture = GL_TRUE;
float *textureEnvironment = modulate;
-struct MipMap {
- int width, height;
- unsigned char *data;
-};
-
int cube, cage, cylinder, torus, genericObject;
float c[6][4][4][3] = {
{
{
1.0, 1.0, -1.0
- },
+ },
{
0.0, 1.0, -1.0
},
},
{
-1.0, 1.0, -1.0
- },
+ },
{
-1.0, 0.0, -1.0
- },
+ },
{
0.0, 0.0, -1.0
},
{
-1.0, 0.0, -1.0
},
- },
+ },
{
{
-1.0, 1.0, 0.0
{
-1.0, 0.0, 0.0
},
- },
+ },
{
{
-1.0, 0.0, 1.0
{
-1.0, 0.0, 0.0
},
- },
+ },
{
{
-1.0, -1.0, 0.0
{
-1.0, 0.0, 0.0
},
- },
+ },
},
{
{
};
-void BuildCylinder(int numEdges)
+static void BuildCylinder(int numEdges)
{
int i, top = 1.0, bottom = -1.0;
- float x[100], y[100], angle;
-
+ float x[100], y[100], angle;
+
for (i = 0; i <= numEdges; i++) {
angle = i * 2.0 * PI / numEdges;
x[i] = cos(angle); /* was cosf() */
glEndList();
}
-void BuildTorus(float rc, int numc, float rt, int numt)
+static void BuildTorus(float rc, int numc, float rt, int numt)
{
int i, j, k;
double s, t;
pi = 3.14159265358979323846;
twopi = 2.0 * pi;
-
+
glNewList(torus, GL_COMPILE);
for (i = 0; i < numc; i++) {
glBegin(GL_QUAD_STRIP);
glEndList();
}
-void BuildCage(void)
+static void BuildCage(void)
{
int i;
float inc;
left = -4.0;
bottom = -4.0;
right = 4.0;
- top = 4.0;
+ top = 4.0;
inc = 2.0 * 4.0 * 0.1;
glEndList();
}
-void BuildCube(void)
+static void BuildCube(void)
{
int i, j;
glNewList(cube, GL_COMPILE);
for (i = 0; i < 6; i++) {
for (j = 0; j < 4; j++) {
- glNormal3fv(n[i]);
+ glNormal3fv(n[i]);
glBegin(GL_POLYGON);
glVertex3fv(c[i][j][0]);
glVertex3fv(c[i][j][1]);
glEndList();
}
-void BuildLists(void)
+static void BuildLists(void)
{
cube = glGenLists(1);
genericObject = torus;
}
-void SetDeepestColor(void)
-{
- GLint redBits, greenBits, blueBits;
-
- glGetIntegerv(GL_RED_BITS, &redBits);
- glGetIntegerv(GL_GREEN_BITS, &greenBits);
- glGetIntegerv(GL_BLUE_BITS, &blueBits);
-
- deepestColor = (redBits >= greenBits) ? COLOR_RED : COLOR_GREEN;
- deepestColor = (deepestColor >= blueBits) ? deepestColor : COLOR_BLUE;
-}
-
-void SetDefaultSettings(void)
+static void SetDefaultSettings(void)
{
magFilter = nnearest;
sWrapMode = repeat;
tWrapMode = repeat;
textureEnvironment = modulate;
- autoRotate = TRUE;
+ autoRotate = GL_TRUE;
}
-unsigned char *AlphaPadImage(int bufSize, unsigned char *inData, int alpha)
+static unsigned char *AlphaPadImage(int bufSize, unsigned char *inData, int alpha)
{
unsigned char *outData, *out_ptr, *in_ptr;
int i;
return outData;
}
-void Init(void)
+static void Init(void)
{
float ambient[] = {0.0, 0.0, 0.0, 1.0};
- float diffuse[] = {0.0, 1.0, 0.0, 1.0};
+ float diffuse[] = {1.0, 1.0, 1.0, 1.0};
float specular[] = {1.0, 1.0, 1.0, 1.0};
- float position[] = {2.0, 2.0, 0.0, 1.0};
+ float position[] = {0.0, 0.0, 4.0, 0.0};
float fog_color[] = {0.0, 0.0, 0.0, 1.0};
float mat_ambient[] = {0.0, 0.0, 0.0, 1.0};
float mat_shininess[] = {90.0};
float mat_specular[] = {1.0, 1.0, 1.0, 1.0};
- float mat_diffuse[] = {1.0, 1.0, 1.0, 1.0};
- float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0};
+ float mat_diffuse[] = {0.8, 0.8, 0.8, 1.0};
+ float lmodel_ambient[] = {0.2, 0.2, 0.2, 1.0};
float lmodel_twoside[] = {GL_TRUE};
+ int w, h;
+ GLenum format;
+ GLubyte *image;
+
+ printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- SetDeepestColor();
SetDefaultSettings();
- if (numComponents == 4) {
- image = LoadPPM(imageFileName);
- image->data = AlphaPadImage(image->sizeX*image->sizeY,
- image->data, 128);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents,
- image->sizeX, image->sizeY,
- GL_RGBA, GL_UNSIGNED_BYTE, image->data);
- } else {
- image = LoadPPM(imageFileName);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents,
- image->sizeX, image->sizeY,
- GL_RGB, GL_UNSIGNED_BYTE, image->data);
+ image = LoadRGBImage(imageFileName, &w, &h, &format);
+ if (!image) {
+ printf("Error: couldn't load %s\n", imageFileName);
+ exit(1);
}
-
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ gluBuild2DMipmaps(GL_TEXTURE_2D, format, w, h,
+ GL_RGB, GL_UNSIGNED_BYTE, image);
+
+ free(image);
+
glFogf(GL_FOG_DENSITY, 0.125);
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogf(GL_FOG_START, 4.0);
- glFogf(GL_FOG_END, 9.0);
+ glFogf(GL_FOG_END, 8.5);
glFogfv(GL_FOG_COLOR, fog_color);
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
glLightfv(GL_LIGHT0, GL_POSITION, position);
-
+ glEnable(GL_LIGHT0);
+
glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse);
glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
glShadeModel(GL_SMOOTH);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
glClearColor(0.0, 0.0, 0.0, 0.0);
- glViewport(0, 0, W, H);
glEnable(GL_DEPTH_TEST);
glFrontFace(GL_CW);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
- glEnable(GL_TEXTURE_2D);
glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap);
glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap);
glEnable(GL_TEXTURE_GEN_S);
BuildLists();
}
-void ReInit(void)
+static void ReInit(void)
{
-
if (genericObject == torus) {
glEnable(GL_DEPTH_TEST);
} else {
glDisable(GL_DEPTH_TEST);
}
+ glEnable(GL_DEPTH_TEST);
+
+#if 0
if (isFogged) {
textureEnvironment = modulate;
}
+#endif
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, textureEnvironment);
}
-void Draw(void)
+static void Draw(void)
{
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0);
- glMatrixMode(GL_MODELVIEW);
-
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
- if (isFogged) {
+
+ /* draw cage */
+ if (isFogged)
glEnable(GL_FOG);
- glColor3fv(RGBMap[deepestColor]);
- } else {
- glColor3fv(RGBMap[COLOR_WHITE]);
- }
+ else
+ glDisable(GL_FOG);
+ glColor3f(1, 1, 1);
glDisable(GL_LIGHTING);
- glDisable(GL_LIGHT0);
glDisable(GL_TEXTURE_2D);
glCallList(cage);
- glPushMatrix();
- glTranslatef(0.0, 0.0, zTranslate);
- glRotatef(xRotation, 1, 0, 0);
- glRotatef(yRotation, 0, 1, 0);
-
- if (isLit == TRUE) {
+ /* draw object */
+ if (isLit)
glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- }
-
- glEnable(GL_TEXTURE_2D);
- if (isFogged) {
- glDisable(GL_FOG);
- }
- glPolygonMode(GL_FRONT, GL_FILL);
- glColor3fv(RGBMap[deepestColor]);
- glCallList(genericObject);
+ else
+ glColor3f(1.0, 0.5, 0.2);
+ if (doTexture)
+ glEnable(GL_TEXTURE_2D);
+ glPushMatrix();
+ glTranslatef(0.0, 0.0, zTranslate);
+ glRotatef(xRotation, 1, 0, 0);
+ glRotatef(yRotation, 0, 1, 0);
+ glCallList(genericObject);
glPopMatrix();
- glFlush();
- if (autoRotate) {
- xRotation += .75;
- yRotation += .375;
- }
+ glFlush();
glutSwapBuffers();
}
-void Reshape(int width, int height)
+static void Reshape(int width, int height)
{
-
W = width;
H = height;
ReInit();
glViewport( 0, 0, width, height ); /*new*/
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0);
+ glMatrixMode(GL_MODELVIEW);
+}
+
+static void Idle(void)
+{
+ static double t0 = -1.;
+ double t, dt;
+ t = glutGet(GLUT_ELAPSED_TIME) / 1000.;
+ if (t0 < 0.)
+ t0 = t;
+ dt = t - t0;
+ t0 = t;
+
+ xRotation += .75*60.*dt;
+ yRotation += .375*60.*dt;
+ glutPostRedisplay();
}
-void Key2(int key, int x, int y)
+static void Key2(int key, int x, int y)
{
switch (key) {
case GLUT_KEY_LEFT:
yRotation -= 0.5;
- autoRotate = FALSE;
+ autoRotate = GL_FALSE;
ReInit();
break;
case GLUT_KEY_RIGHT:
yRotation += 0.5;
- autoRotate = FALSE;
+ autoRotate = GL_FALSE;
ReInit();
break;
case GLUT_KEY_UP:
xRotation -= 0.5;
- autoRotate = FALSE;
+ autoRotate = GL_FALSE;
ReInit();
break;
case GLUT_KEY_DOWN:
xRotation += 0.5;
- autoRotate = FALSE;
+ autoRotate = GL_FALSE;
ReInit();
break;
default:
return;
}
+ glutPostRedisplay();
}
-void Key(unsigned char key, int x, int y)
+static void Key(unsigned char key, int x, int y)
{
switch (key) {
case 27:
- free(image->data);
+ /* free(image->data);*/
exit(1);
case 'a':
autoRotate = !autoRotate;
+ if (autoRotate)
+ glutIdleFunc(Idle);
+ else
+ glutIdleFunc(NULL);
+
ReInit();
break;
- case 'c':
- genericObject = (genericObject == cube) ? cylinder : cube;
+ case 'o':
+ if (genericObject == cube) {
+ genericObject = cylinder;
+ }
+ else if (genericObject == cylinder) {
+ genericObject = torus;
+ }
+ else {
+ genericObject = cube;
+ }
ReInit();
break;
case 'd':
ReInit();
break;
case 't':
- genericObject = torus;
+ doTexture = !doTexture;
ReInit();
break;
case '0':
default:
return;
}
+ glutPostRedisplay();
}
-GLenum Args(int argc, char **argv)
+static GLenum Args(int argc, char **argv)
{
GLint i;
- doubleBuffer = GL_FALSE;
- numComponents = 4;
+ doubleBuffer = GL_TRUE;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-sb") == 0) {
} else {
imageFileName = argv[++i];
}
- } else if (strcmp(argv[i], "-4") == 0) {
- numComponents = 4;
- } else if (strcmp(argv[i], "-3") == 0) {
- numComponents = 3;
} else {
printf("%s (Bad option).\n", argv[i]);
return GL_FALSE;
return GL_TRUE;
}
-void GLUTCALLBACK glut_post_redisplay_p(void)
-{
- glutPostRedisplay();
-}
-
int main(int argc, char **argv)
{
GLenum type;
glutKeyboardFunc(Key);
glutSpecialFunc(Key2);
glutDisplayFunc(Draw);
- glutIdleFunc(glut_post_redisplay_p);
+ glutIdleFunc(Idle);
glutMainLoop();
return 0;
projects / mesa.git / blobdiff