+++ /dev/null
-/*
- * This program is under the GNU GPL.
- * Use at your own risk.
- *
- * written by David Bucciarelli (tech.hmw@plus.it)
- * Humanware s.r.l.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-#ifdef WIN32
-#include <windows.h>
-#endif
-
-#include <GL/glut.h>
-
-#ifdef XMESA
-#include "GL/xmesa.h"
-static int fullscreen = 1;
-#endif
-
-static int WIDTH = 640;
-static int HEIGHT = 480;
-
-static GLint T0 = 0;
-static GLint Frames = 0;
-
-#define BASESIZE 7.5f
-#define SPHERE_RADIUS 0.75f
-
-#define TEX_CHECK_WIDTH 256
-#define TEX_CHECK_HEIGHT 256
-#define TEX_CHECK_SLOT_SIZE (TEX_CHECK_HEIGHT/16)
-#define TEX_CHECK_NUMSLOT (TEX_CHECK_HEIGHT/TEX_CHECK_SLOT_SIZE)
-
-#define TEX_REFLECT_WIDTH 256
-#define TEX_REFLECT_HEIGHT 256
-#define TEX_REFLECT_SLOT_SIZE (TEX_REFLECT_HEIGHT/16)
-#define TEX_REFLECT_NUMSLOT (TEX_REFLECT_HEIGHT/TEX_REFLECT_SLOT_SIZE)
-
-#ifndef M_PI
-#define M_PI 3.1415926535
-#endif
-
-#define EPSILON 0.0001
-
-#define clamp255(a) ( (a)<(0.0f) ? (0.0f) : ((a)>(255.0f) ? (255.0f) : (a)) )
-
-#ifndef fabs
-#define fabs(x) ((x)<0.0f?-(x):(x))
-#endif
-
-#define vequ(a,b) { (a)[0]=(b)[0]; (a)[1]=(b)[1]; (a)[2]=(b)[2]; }
-#define vsub(a,b,c) { (a)[0]=(b)[0]-(c)[0]; (a)[1]=(b)[1]-(c)[1]; (a)[2]=(b)[2]-(c)[2]; }
-#define dprod(a,b) ((a)[0]*(b)[0]+(a)[1]*(b)[1]+(a)[2]*(b)[2])
-#define vnormalize(a,b) { \
- register float m_norm; \
- m_norm=sqrt((double)dprod((a),(a))); \
- (a)[0] /=m_norm; \
- (a)[1] /=m_norm; \
- (a)[2] /=m_norm; }
-
-static GLubyte checkmap[TEX_CHECK_HEIGHT][TEX_CHECK_WIDTH][3];
-static GLuint checkid;
-static int checkmap_currentslot = 0;
-
-static GLubyte reflectmap[TEX_REFLECT_HEIGHT][TEX_REFLECT_WIDTH][3];
-static GLuint reflectid;
-static int reflectmap_currentslot = 0;
-
-static GLuint lightdlist;
-static GLuint objdlist;
-
-static float lightpos[3] = { 2.1, 2.1, 2.8 };
-static float objpos[3] = { 0.0, 0.0, 1.0 };
-
-static float sphere_pos[TEX_CHECK_HEIGHT][TEX_REFLECT_WIDTH][3];
-
-static int win = 0;
-
-static float fogcolor[4] = { 0.05, 0.05, 0.05, 1.0 };
-
-static float obs[3] = { 7.0, 0.0, 2.0 };
-static float dir[3];
-static float v = 0.0;
-static float alpha = -90.0;
-static float beta = 90.0;
-
-static int fog = 1;
-static int bfcull = 1;
-static int poutline = 0;
-static int help = 1;
-static int showcheckmap = 1;
-static int showreflectmap = 1;
-static int joyavailable = 0;
-static int joyactive = 0;
-
-static void
-calcposobs(void)
-{
- dir[0] = sin(alpha * M_PI / 180.0);
- dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
- dir[2] = cos(beta * M_PI / 180.0);
-
- if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
- dir[0] = 0;
- if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
- dir[1] = 0;
- if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
- dir[2] = 0;
-
- obs[0] += v * dir[0];
- obs[1] += v * dir[1];
- obs[2] += v * dir[2];
-}
-
-static void
-special(int k, int x, int y)
-{
- switch (k) {
- case GLUT_KEY_LEFT:
- alpha -= 2.0;
- break;
- case GLUT_KEY_RIGHT:
- alpha += 2.0;
- break;
- case GLUT_KEY_DOWN:
- beta -= 2.0;
- break;
- case GLUT_KEY_UP:
- beta += 2.0;
- break;
- }
-}
-
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27:
- exit(0);
- break;
-
- case 's':
- lightpos[1] -= 0.1;
- break;
- case 'd':
- lightpos[1] += 0.1;
- break;
- case 'e':
- lightpos[0] -= 0.1;
- break;
- case 'x':
- lightpos[0] += 0.1;
- break;
- case 'w':
- lightpos[2] -= 0.1;
- break;
- case 'r':
- lightpos[2] += 0.1;
- break;
-
- case 'j':
- objpos[1] -= 0.1;
- break;
- case 'k':
- objpos[1] += 0.1;
- break;
- case 'i':
- objpos[0] -= 0.1;
- break;
- case 'm':
- objpos[0] += 0.1;
- break;
- case 'u':
- objpos[2] -= 0.1;
- break;
- case 'o':
- objpos[2] += 0.1;
- break;
-
- case 'a':
- v += 0.005;
- break;
- case 'z':
- v -= 0.005;
- break;
-
- case 'g':
- joyactive = (!joyactive);
- break;
- case 'h':
- help = (!help);
- break;
- case 'f':
- fog = (!fog);
- break;
-
- case '1':
- showcheckmap = (!showcheckmap);
- break;
- case '2':
- showreflectmap = (!showreflectmap);
- break;
-
- case 'b':
- if (bfcull) {
- glDisable(GL_CULL_FACE);
- bfcull = 0;
- }
- else {
- glEnable(GL_CULL_FACE);
- bfcull = 1;
- }
- break;
- case 'p':
- if (poutline) {
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
- poutline = 0;
- }
- else {
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- poutline = 1;
- }
- break;
-#ifdef XMESA
- case ' ':
- XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
- fullscreen = (!fullscreen);
- break;
-#endif
- }
-}
-
-static void
-reshape(int w, int h)
-{
- WIDTH = w;
- HEIGHT = h;
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(45.0, w / (float) h, 0.8, 40.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-static void
-printstring(void *font, char *string)
-{
- int len, i;
-
- len = (int) strlen(string);
- for (i = 0; i < len; i++)
- glutBitmapCharacter(font, string[i]);
-}
-
-static void
-printhelp(void)
-{
- glEnable(GL_BLEND);
- glColor4f(0.5, 0.5, 0.5, 0.5);
- glRecti(40, 40, 600, 440);
- glDisable(GL_BLEND);
-
- glColor3f(0.0, 0.0, 1.0);
- glRasterPos2i(300, 420);
- printstring(GLUT_BITMAP_HELVETICA_18, "Help");
-
- glRasterPos2i(60, 390);
- printstring(GLUT_BITMAP_HELVETICA_12, "h - Toggle Help");
- glRasterPos2i(60, 370);
- printstring(GLUT_BITMAP_HELVETICA_12, "f - Toggle Fog");
- glRasterPos2i(60, 350);
- printstring(GLUT_BITMAP_HELVETICA_12, "b - Toggle Back face culling");
- glRasterPos2i(60, 330);
- printstring(GLUT_BITMAP_HELVETICA_12, "p - Toggle Wire frame");
- glRasterPos2i(60, 310);
- printstring(GLUT_BITMAP_HELVETICA_12, "Arrow Keys - Rotate");
- glRasterPos2i(60, 290);
- printstring(GLUT_BITMAP_HELVETICA_12, "a - Increase velocity");
- glRasterPos2i(60, 270);
- printstring(GLUT_BITMAP_HELVETICA_12, "z - Decrease velocity");
-
- glRasterPos2i(60, 250);
- if (joyavailable)
- printstring(GLUT_BITMAP_HELVETICA_12,
- "j - Toggle jostick control (Joystick control available)");
- else
- printstring(GLUT_BITMAP_HELVETICA_12,
- "(No Joystick control available)");
-
- glRasterPos2i(60, 230);
- printstring(GLUT_BITMAP_HELVETICA_12,
- "To move the light source: s - left, d - right, e - far, x - near, w - down r - up");
- glRasterPos2i(60, 210);
- printstring(GLUT_BITMAP_HELVETICA_12,
- "To move the mirror sphere: j - left, k - right, i - far, m - near, u - down o - up");
-
- glRasterPos2i(60, 190);
- printstring(GLUT_BITMAP_HELVETICA_12,
- "1 - Toggle the plane texture map window");
-
- glRasterPos2i(60, 170);
- printstring(GLUT_BITMAP_HELVETICA_12,
- "2 - Toggle the sphere texture map window");
-}
-
-static GLboolean
-seelight(float p[3], float dir[3])
-{
- float c[3], b, a, d, t, dist[3];
-
- vsub(c, p, objpos);
- b = -dprod(c, dir);
- a = dprod(c, c) - SPHERE_RADIUS * SPHERE_RADIUS;
-
- if ((d = b * b - a) < 0.0 || (b < 0.0 && a > 0.0))
- return GL_FALSE;
-
- d = sqrt(d);
-
- t = b - d;
-
- if (t < EPSILON) {
- t = b + d;
- if (t < EPSILON)
- return GL_FALSE;
- }
-
- vsub(dist, lightpos, p);
- if (dprod(dist, dist) < t * t)
- return GL_FALSE;
-
- return GL_TRUE;
-}
-
-static int
-colorcheckmap(float ppos[3], float c[3])
-{
- static float norm[3] = { 0.0f, 0.0f, 1.0f };
- float ldir[3], vdir[3], h[3], dfact, kfact, r, g, b;
- int x, y;
-
- x = (int) ((ppos[0] + BASESIZE / 2) * (10.0f / BASESIZE));
- if ((x < 0) || (x > 10))
- return GL_FALSE;
-
- y = (int) ((ppos[1] + BASESIZE / 2) * (10.0f / BASESIZE));
- if ((y < 0) || (y > 10))
- return GL_FALSE;
-
- r = 255.0f;
- if (y & 1) {
- if (x & 1)
- g = 255.0f;
- else
- g = 0.0f;
- }
- else {
- if (x & 1)
- g = 0.0f;
- else
- g = 255.0f;
- }
- b = 0.0f;
-
- vsub(ldir, lightpos, ppos);
- vnormalize(ldir, ldir);
-
- if (seelight(ppos, ldir)) {
- c[0] = r * 0.05f;
- c[1] = g * 0.05f;
- c[2] = b * 0.05f;
-
- return GL_TRUE;
- }
-
- dfact = dprod(ldir, norm);
- if (dfact < 0.0f)
- dfact = 0.0f;
-
- vsub(vdir, obs, ppos);
- vnormalize(vdir, vdir);
- h[0] = 0.5f * (vdir[0] + ldir[0]);
- h[1] = 0.5f * (vdir[1] + ldir[1]);
- h[2] = 0.5f * (vdir[2] + ldir[2]);
- kfact = dprod(h, norm);
- kfact = pow(kfact, 6.0) * 7.0 * 255.0;
-
- r = r * dfact + kfact;
- g = g * dfact + kfact;
- b = b * dfact + kfact;
-
- c[0] = clamp255(r);
- c[1] = clamp255(g);
- c[2] = clamp255(b);
-
- return GL_TRUE;
-}
-
-static void
-updatecheckmap(int slot)
-{
- float c[3], ppos[3];
- int x, y;
-
- glBindTexture(GL_TEXTURE_2D, checkid);
-
- ppos[2] = 0.0f;
- for (y = slot * TEX_CHECK_SLOT_SIZE; y < (slot + 1) * TEX_CHECK_SLOT_SIZE;
- y++) {
- ppos[1] = (y / (float) TEX_CHECK_HEIGHT) * BASESIZE - BASESIZE / 2;
-
- for (x = 0; x < TEX_CHECK_WIDTH; x++) {
- ppos[0] = (x / (float) TEX_CHECK_WIDTH) * BASESIZE - BASESIZE / 2;
-
- colorcheckmap(ppos, c);
- checkmap[y][x][0] = (GLubyte) c[0];
- checkmap[y][x][1] = (GLubyte) c[1];
- checkmap[y][x][2] = (GLubyte) c[2];
- }
- }
-
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, slot * TEX_CHECK_SLOT_SIZE,
- TEX_CHECK_WIDTH, TEX_CHECK_SLOT_SIZE, GL_RGB,
- GL_UNSIGNED_BYTE,
- &checkmap[slot * TEX_CHECK_SLOT_SIZE][0][0]);
-
-}
-
-static void
-updatereflectmap(int slot)
-{
- float rf, r, g, b, t, dfact, kfact, rdir[3];
- float rcol[3], ppos[3], norm[3], ldir[3], h[3], vdir[3], planepos[3];
- int x, y;
-
- glBindTexture(GL_TEXTURE_2D, reflectid);
-
- for (y = slot * TEX_REFLECT_SLOT_SIZE;
- y < (slot + 1) * TEX_REFLECT_SLOT_SIZE; y++)
- for (x = 0; x < TEX_REFLECT_WIDTH; x++) {
- ppos[0] = sphere_pos[y][x][0] + objpos[0];
- ppos[1] = sphere_pos[y][x][1] + objpos[1];
- ppos[2] = sphere_pos[y][x][2] + objpos[2];
-
- vsub(norm, ppos, objpos);
- vnormalize(norm, norm);
-
- vsub(ldir, lightpos, ppos);
- vnormalize(ldir, ldir);
- vsub(vdir, obs, ppos);
- vnormalize(vdir, vdir);
-
- rf = 2.0f * dprod(norm, vdir);
- if (rf > EPSILON) {
- rdir[0] = rf * norm[0] - vdir[0];
- rdir[1] = rf * norm[1] - vdir[1];
- rdir[2] = rf * norm[2] - vdir[2];
-
- t = -objpos[2] / rdir[2];
-
- if (t > EPSILON) {
- planepos[0] = objpos[0] + t * rdir[0];
- planepos[1] = objpos[1] + t * rdir[1];
- planepos[2] = 0.0f;
-
- if (!colorcheckmap(planepos, rcol))
- rcol[0] = rcol[1] = rcol[2] = 0.0f;
- }
- else
- rcol[0] = rcol[1] = rcol[2] = 0.0f;
- }
- else
- rcol[0] = rcol[1] = rcol[2] = 0.0f;
-
- dfact = 0.1f * dprod(ldir, norm);
-
- if (dfact < 0.0f) {
- dfact = 0.0f;
- kfact = 0.0f;
- }
- else {
- h[0] = 0.5f * (vdir[0] + ldir[0]);
- h[1] = 0.5f * (vdir[1] + ldir[1]);
- h[2] = 0.5f * (vdir[2] + ldir[2]);
- kfact = dprod(h, norm);
- kfact = pow(kfact, 4.0);
- if (kfact < 1.0e-10)
- kfact = 0.0;
- }
-
- r = dfact + kfact;
- g = dfact + kfact;
- b = dfact + kfact;
-
- r *= 255.0f;
- g *= 255.0f;
- b *= 255.0f;
-
- r += rcol[0];
- g += rcol[1];
- b += rcol[2];
-
- r = clamp255(r);
- g = clamp255(g);
- b = clamp255(b);
-
- reflectmap[y][x][0] = (GLubyte) r;
- reflectmap[y][x][1] = (GLubyte) g;
- reflectmap[y][x][2] = (GLubyte) b;
- }
-
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, slot * TEX_REFLECT_SLOT_SIZE,
- TEX_REFLECT_WIDTH, TEX_REFLECT_SLOT_SIZE, GL_RGB,
- GL_UNSIGNED_BYTE,
- &reflectmap[slot * TEX_REFLECT_SLOT_SIZE][0][0]);
-}
-
-static void
-drawbase(void)
-{
- glColor3f(0.0, 0.0, 0.0);
- glBindTexture(GL_TEXTURE_2D, checkid);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
- glBegin(GL_QUADS);
- glTexCoord2f(0.0f, 0.0f);
- glVertex3f(-BASESIZE / 2.0f, -BASESIZE / 2.0f, 0.0f);
-
- glTexCoord2f(1.0f, 0.0f);
- glVertex3f(BASESIZE / 2.0f, -BASESIZE / 2.0f, 0.0f);
-
- glTexCoord2f(1.0f, 1.0f);
- glVertex3f(BASESIZE / 2.0f, BASESIZE / 2.0f, 0.0f);
-
- glTexCoord2f(0.0f, 1.0f);
- glVertex3f(-BASESIZE / 2.0f, BASESIZE / 2.0f, 0.0f);
-
- glEnd();
-}
-
-static void
-drawobj(void)
-{
- glColor3f(0.0, 0.0, 0.0);
- glBindTexture(GL_TEXTURE_2D, reflectid);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
- glPushMatrix();
- glTranslatef(objpos[0], objpos[1], objpos[2]);
- glCallList(objdlist);
- glPopMatrix();
-}
-
-static void
-dojoy(void)
-{
-#ifdef WIN32
- static UINT max[2] = { 0, 0 };
- static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
- MMRESULT res;
- JOYINFO joy;
-
- res = joyGetPos(JOYSTICKID1, &joy);
-
- if (res == JOYERR_NOERROR) {
- joyavailable = 1;
-
- if (max[0] < joy.wXpos)
- max[0] = joy.wXpos;
- if (min[0] > joy.wXpos)
- min[0] = joy.wXpos;
- center[0] = (max[0] + min[0]) / 2;
-
- if (max[1] < joy.wYpos)
- max[1] = joy.wYpos;
- if (min[1] > joy.wYpos)
- min[1] = joy.wYpos;
- center[1] = (max[1] + min[1]) / 2;
-
- if (joyactive) {
- if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
- alpha -=
- 2.5 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
- if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
- beta += 2.5 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
-
- if (joy.wButtons & JOY_BUTTON1)
- v += 0.005;
- if (joy.wButtons & JOY_BUTTON2)
- v -= 0.005;
- }
- }
- else
- joyavailable = 0;
-#endif
-}
-
-static void
-updatemaps(void)
-{
- updatecheckmap(checkmap_currentslot);
- checkmap_currentslot = (checkmap_currentslot + 1) % TEX_CHECK_NUMSLOT;
-
- updatereflectmap(reflectmap_currentslot);
- reflectmap_currentslot =
- (reflectmap_currentslot + 1) % TEX_REFLECT_NUMSLOT;
-}
-
-static void
-draw(void)
-{
- static char frbuf[80] = "";
-
- dojoy();
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glEnable(GL_TEXTURE_2D);
- glEnable(GL_DEPTH_TEST);
- if (fog)
- glEnable(GL_FOG);
- else
- glDisable(GL_FOG);
-
- glPushMatrix();
- calcposobs();
-
- gluLookAt(obs[0], obs[1], obs[2],
- obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
- 0.0, 0.0, 1.0);
-
- drawbase();
- drawobj();
-
- glColor3f(1.0, 1.0, 1.0);
- glDisable(GL_TEXTURE_2D);
-
- glPushMatrix();
- glTranslatef(lightpos[0], lightpos[1], lightpos[2]);
- glCallList(lightdlist);
- glPopMatrix();
-
- glPopMatrix();
-
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_FOG);
-
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
- glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
-
- glColor3f(0.0f, 0.3f, 1.0f);
-
- if (showcheckmap) {
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, checkid);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
- glBegin(GL_QUADS);
- glTexCoord2f(1.0f, 0.0f);
- glVertex2i(10, 30);
- glTexCoord2f(1.0f, 1.0f);
- glVertex2i(10 + 90, 30);
- glTexCoord2f(0.0f, 1.0f);
- glVertex2i(10 + 90, 30 + 90);
- glTexCoord2f(0.0f, 0.0f);
- glVertex2i(10, 30 + 90);
- glEnd();
-
- glDisable(GL_TEXTURE_2D);
- glBegin(GL_LINE_LOOP);
- glVertex2i(10, 30);
- glVertex2i(10 + 90, 30);
- glVertex2i(10 + 90, 30 + 90);
- glVertex2i(10, 30 + 90);
- glEnd();
- glRasterPos2i(105, 65);
- printstring(GLUT_BITMAP_HELVETICA_18, "Plane Texture Map");
- }
-
- if (showreflectmap) {
- glEnable(GL_TEXTURE_2D);
- glBindTexture(GL_TEXTURE_2D, reflectid);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
- glBegin(GL_QUADS);
- glTexCoord2f(1.0f, 0.0f);
- glVertex2i(540, 30);
- glTexCoord2f(1.0f, 1.0f);
- glVertex2i(540 + 90, 30);
- glTexCoord2f(0.0f, 1.0f);
- glVertex2i(540 + 90, 30 + 90);
- glTexCoord2f(0.0f, 0.0f);
- glVertex2i(540, 30 + 90);
- glEnd();
-
- glDisable(GL_TEXTURE_2D);
- glBegin(GL_LINE_LOOP);
- glVertex2i(540, 30);
- glVertex2i(540 + 90, 30);
- glVertex2i(540 + 90, 30 + 90);
- glVertex2i(540, 30 + 90);
- glEnd();
- glRasterPos2i(360, 65);
- printstring(GLUT_BITMAP_HELVETICA_18, "Sphere Texture Map");
- }
-
- glDisable(GL_TEXTURE_2D);
-
- glRasterPos2i(10, 10);
- printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
- glRasterPos2i(360, 470);
- printstring(GLUT_BITMAP_HELVETICA_10,
- "Ray V1.0 Written by David Bucciarelli (tech.hmw@plus.it)");
-
- if (help)
- printhelp();
-
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glMatrixMode(GL_MODELVIEW);
-
- updatemaps();
-
- glutSwapBuffers();
-
- Frames++;
- {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 2000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- sprintf(frbuf, "Frame rate: %f", fps);
- T0 = t;
- Frames = 0;
- }
- }
-}
-
-static void
-inittextures(void)
-{
- int y;
-
- glGenTextures(1, &checkid);
- glBindTexture(GL_TEXTURE_2D, checkid);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, TEX_CHECK_WIDTH, TEX_CHECK_HEIGHT,
- 0, GL_RGB, GL_UNSIGNED_BYTE, checkmap);
-
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- for (y = 0; y < TEX_CHECK_NUMSLOT; y++)
- updatecheckmap(y);
-
-
-
- glGenTextures(1, &reflectid);
- glBindTexture(GL_TEXTURE_2D, reflectid);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, TEX_REFLECT_WIDTH, TEX_REFLECT_HEIGHT,
- 0, GL_RGB, GL_UNSIGNED_BYTE, reflectmap);
-
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- for (y = 0; y < TEX_REFLECT_NUMSLOT; y++)
- updatereflectmap(y);
-
-
-}
-
-static void
-initspherepos(void)
-{
- float alpha, beta, sa, ca, sb, cb;
- int x, y;
-
- for (y = 0; y < TEX_REFLECT_HEIGHT; y++) {
- beta = M_PI - y * (M_PI / TEX_REFLECT_HEIGHT);
-
- for (x = 0; x < TEX_REFLECT_WIDTH; x++) {
- alpha = -x * (2.0f * M_PI / TEX_REFLECT_WIDTH);
-
- sa = sin(alpha);
- ca = cos(alpha);
-
- sb = sin(beta);
- cb = cos(beta);
-
- sphere_pos[y][x][0] = SPHERE_RADIUS * sa * sb;
- sphere_pos[y][x][1] = SPHERE_RADIUS * ca * sb;
- sphere_pos[y][x][2] = SPHERE_RADIUS * cb;
- }
- }
-}
-
-static void
-initdlists(void)
-{
- GLUquadricObj *obj;
-
- obj = gluNewQuadric();
-
- lightdlist = glGenLists(1);
- glNewList(lightdlist, GL_COMPILE);
- gluQuadricDrawStyle(obj, GLU_FILL);
- gluQuadricNormals(obj, GLU_NONE);
- gluQuadricTexture(obj, GL_TRUE);
- gluSphere(obj, 0.25f, 6, 6);
- glEndList();
-
- objdlist = glGenLists(1);
- glNewList(objdlist, GL_COMPILE);
- gluQuadricDrawStyle(obj, GLU_FILL);
- gluQuadricNormals(obj, GLU_NONE);
- gluQuadricTexture(obj, GL_TRUE);
- gluSphere(obj, SPHERE_RADIUS, 16, 16);
- glEndList();
-
- gluDeleteQuadric(obj);
-}
-
-int
-main(int ac, char **av)
-{
- fprintf(stderr,
- "Ray V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
-
- /*
- if(!SetPriorityClass(GetCurrentProcess(),REALTIME_PRIORITY_CLASS)) {
- fprintf(stderr,"Error setting the process class.\n");
- return 0;
- }
-
- if(!SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_TIME_CRITICAL)) {
- fprintf(stderr,"Error setting the process priority.\n");
- return 0;
- }
- */
-
- glutInitWindowSize(WIDTH, HEIGHT);
- glutInit(&ac, av);
-
- glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
-
- if (!(win = glutCreateWindow("Ray"))) {
- fprintf(stderr, "Error, couldn't open window\n");
- return -1;
- }
-
- reshape(WIDTH, HEIGHT);
-
- glShadeModel(GL_FLAT);
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LEQUAL);
- glEnable(GL_CULL_FACE);
- glEnable(GL_TEXTURE_2D);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
- glEnable(GL_FOG);
- glFogi(GL_FOG_MODE, GL_EXP2);
- glFogfv(GL_FOG_COLOR, fogcolor);
-
- glFogf(GL_FOG_DENSITY, 0.01);
-#ifdef FX
- glHint(GL_FOG_HINT, GL_NICEST);
-#endif
-
- calcposobs();
-
- initspherepos();
-
- inittextures();
- initdlists();
-
- glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
-
- glutReshapeFunc(reshape);
- glutDisplayFunc(draw);
- glutKeyboardFunc(key);
- glutSpecialFunc(special);
- glutIdleFunc(draw);
-
- glutMainLoop();
-
- return 0;
-}
projects / mesa.git / blobdiff