+++ /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 <math.h>
-#include <string.h>
-
-#if defined (WIN32)|| defined(_WIN32)
-#include <windows.h>
-#include <mmsystem.h>
-#endif
-
-#include <GL/glut.h>
-
-#include "readtex.h"
-
-#ifdef XMESA
-#include "GL/xmesa.h"
-static int fullscreen = 1;
-#endif
-
-static int WIDTH = 640;
-static int HEIGHT = 480;
-
-static GLint T0;
-static GLint Frames;
-
-#define MAX_LOD 9
-
-#define TEX_SKY_WIDTH 256
-#define TEX_SKY_HEIGHT TEX_SKY_WIDTH
-
-#ifndef M_PI
-#define M_PI 3.1415926535
-#endif
-
-#define FROM_NONE 0
-#define FROM_DOWN 1
-#define FROM_UP 2
-#define FROM_LEFT 3
-#define FROM_RIGHT 4
-#define FROM_FRONT 5
-#define FROM_BACK 6
-
-static int win = 0;
-
-static float obs[3] = { 3.8, 0.0, 0.0 };
-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 usetex = 1;
-static int help = 1;
-static int poutline = 0;
-static int normext = 1;
-static int joyavailable = 0;
-static int joyactive = 0;
-static int LODbias = 3;
-static int maxdepth = MAX_LOD;
-
-static unsigned int totpoly = 0;
-
-static GLuint t1id, t2id;
-static GLuint skydlist, LODdlist[MAX_LOD], LODnumpoly[MAX_LOD];
-
-static void
-initlight(void)
-{
- GLfloat lspec[4] = { 1.0, 1.0, 1.0, 1.0 };
- static GLfloat lightpos[4] = { 30, 15.0, 30.0, 1.0 };
-
- glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
- glLightfv(GL_LIGHT0, GL_SPECULAR, lspec);
-
- glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 32.0);
- glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, lspec);
-}
-
-static void
-initdlists(void)
-{
- static int slicetable[MAX_LOD][2] = {
- {21, 10},
- {18, 9},
- {15, 8},
- {12, 7},
- {9, 6},
- {7, 5},
- {5, 4},
- {4, 3},
- {3, 2}
- };
- GLUquadricObj *obj;
- int i, xslices, yslices;
-
- obj = gluNewQuadric();
-
- skydlist = glGenLists(1);
- glNewList(skydlist, GL_COMPILE);
- glBindTexture(GL_TEXTURE_2D, t2id);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- glColor3f(1.0f, 1.0f, 1.0f);
-
- gluQuadricDrawStyle(obj, GLU_FILL);
- gluQuadricNormals(obj, GLU_NONE);
- gluQuadricTexture(obj, GL_TRUE);
- gluQuadricOrientation(obj, GLU_INSIDE);
- gluSphere(obj, 40.0f, 18, 9);
-
- glEndList();
-
- for (i = 0; i < MAX_LOD; i++) {
- LODdlist[i] = glGenLists(1);
- glNewList(LODdlist[i], GL_COMPILE);
-
- gluQuadricDrawStyle(obj, GLU_FILL);
- gluQuadricNormals(obj, GLU_SMOOTH);
- gluQuadricTexture(obj, GL_TRUE);
- gluQuadricOrientation(obj, GLU_OUTSIDE);
- xslices = slicetable[i][0];
- yslices = slicetable[i][1];
- gluSphere(obj, 1.0f, xslices, yslices);
- LODnumpoly[i] = xslices * (yslices - 2) + 2 * (xslices - 1);
-
- glEndList();
- }
-
- gluDeleteQuadric(obj);
-}
-
-static void
-inittextures(void)
-{
- GLubyte tsky[TEX_SKY_HEIGHT][TEX_SKY_WIDTH][3];
- GLuint x, y;
- GLfloat fact;
- GLenum gluerr;
-
- /* Brick */
-
- glGenTextures(1, &t1id);
- glBindTexture(GL_TEXTURE_2D, t1id);
-
- if (!LoadRGBMipmaps("../images/bw.rgb", 3)) {
- fprintf(stderr, "Error reading a texture.\n");
- exit(-1);
- }
-
- 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_MIPMAP_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- /* Sky */
-
- glGenTextures(1, &t2id);
- glBindTexture(GL_TEXTURE_2D, t2id);
-
- for (y = 0; y < TEX_SKY_HEIGHT; y++)
- for (x = 0; x < TEX_SKY_WIDTH; x++)
- if (y < TEX_SKY_HEIGHT / 2) {
- fact = y / (GLfloat) (TEX_SKY_HEIGHT / 2);
- tsky[y][x][0] =
- (GLubyte) (255.0f * (0.1f * fact + 0.3f * (1.0f - fact)));
- tsky[y][x][1] =
- (GLubyte) (255.0f * (0.2f * fact + 1.0f * (1.0f - fact)));
- tsky[y][x][2] = 255;
- }
- else {
- tsky[y][x][0] = tsky[TEX_SKY_HEIGHT - y - 1][x][0];
- tsky[y][x][1] = tsky[TEX_SKY_HEIGHT - y - 1][x][1];
- tsky[y][x][2] = 255;
- }
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- if (
- (gluerr =
- gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TEX_SKY_WIDTH, TEX_SKY_HEIGHT,
- GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) (tsky)))) {
- fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
- exit(-1);
- }
-
- 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_MIPMAP_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-}
-
-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
-cleanup(void)
-{
- int i;
-
- glDeleteTextures(1, &t1id);
- glDeleteTextures(1, &t2id);
-
- glDeleteLists(skydlist, 1);
- for (i = 0; i < MAX_LOD; i++) {
- glDeleteLists(LODdlist[i], 1);
- glDeleteLists(LODnumpoly[i], 1);
- }
-}
-
-
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27:
- cleanup();
- exit(0);
- break;
-
- case 'a':
- v += 0.01;
- break;
- case 'z':
- v -= 0.01;
- break;
-
-#ifdef XMESA
- case ' ':
- fullscreen = (!fullscreen);
- XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
- break;
-#endif
-
- case '+':
- LODbias--;
- break;
- case '-':
- LODbias++;
- break;
- case 'j':
- joyactive = (!joyactive);
- break;
- case 'h':
- help = (!help);
- break;
- case 'f':
- fog = (!fog);
- break;
- case 't':
- usetex = (!usetex);
- break;
- case 'n':
- normext = (!normext);
- 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;
- usetex = 1;
- }
- else {
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- poutline = 1;
- usetex = 0;
- }
- break;
- }
-}
-
-static void
-reshape(int w, int h)
-{
- WIDTH = w;
- HEIGHT = h;
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(90.0, w / (float) h, 0.8, 100.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glViewport(0, 0, w, h);
-}
-
-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(1.0, 0.0, 0.0);
- glRasterPos2i(300, 420);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
-
- glRasterPos2i(60, 390);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
- glRasterPos2i(60, 360);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures");
- glRasterPos2i(60, 330);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
- glRasterPos2i(60, 300);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
- glRasterPos2i(60, 270);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
- glRasterPos2i(60, 240);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
- glRasterPos2i(60, 210);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
- glRasterPos2i(60, 180);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "p - Toggle Wire frame");
- glRasterPos2i(60, 150);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,
- "n - Toggle GL_EXT_rescale_normal extension");
- glRasterPos2i(60, 120);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,
- "+/- - Increase/decrease the Object maximum LOD");
-
- glRasterPos2i(60, 90);
- if (joyavailable)
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,
- "j - Toggle jostick control (Joystick control available)");
- else
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,
- "(No Joystick control available)");
-}
-
-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 -=
- 2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
- if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
- beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
-
- if (joy.wButtons & JOY_BUTTON1)
- v += 0.01;
- if (joy.wButtons & JOY_BUTTON2)
- v -= 0.01;
- }
- }
- else
- joyavailable = 0;
-#endif
-}
-
-static void
-drawipers(int depth, int from)
-{
- int lod;
-
- if (depth == maxdepth)
- return;
-
- lod = depth + LODbias;
- if (lod < 0)
- lod = 0;
- if (lod >= MAX_LOD)
- return;
-
- switch (from) {
- case FROM_NONE:
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_LEFT);
- drawipers(depth, FROM_RIGHT);
- break;
- case FROM_FRONT:
- glPushMatrix();
- glTranslatef(0.0f, -1.5f, 0.0f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_LEFT);
- drawipers(depth, FROM_RIGHT);
- glPopMatrix();
- break;
- case FROM_BACK:
- glPushMatrix();
- glTranslatef(0.0f, 1.5f, 0.0f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_LEFT);
- drawipers(depth, FROM_RIGHT);
- glPopMatrix();
- break;
- case FROM_LEFT:
- glPushMatrix();
- glTranslatef(-1.5f, 0.0f, 0.0f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_LEFT);
- glPopMatrix();
- break;
- case FROM_RIGHT:
- glPushMatrix();
- glTranslatef(1.5f, 0.0f, 0.0f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_RIGHT);
- glPopMatrix();
- break;
- case FROM_DOWN:
- glPushMatrix();
- glTranslatef(0.0f, 0.0f, 1.5f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_DOWN);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_LEFT);
- drawipers(depth, FROM_RIGHT);
- glPopMatrix();
- break;
- case FROM_UP:
- glPushMatrix();
- glTranslatef(0.0f, 0.0f, -1.5f);
- glScalef(0.5f, 0.5f, 0.5f);
-
- glCallList(LODdlist[lod]);
-
- depth++;
- drawipers(depth, FROM_UP);
- drawipers(depth, FROM_FRONT);
- drawipers(depth, FROM_BACK);
- drawipers(depth, FROM_LEFT);
- drawipers(depth, FROM_RIGHT);
- glPopMatrix();
- break;
- }
-
- totpoly += LODnumpoly[lod];
-}
-
-static void
-draw(void)
-{
- static char frbuf[80] = "";
- static GLfloat alpha = 0.0f;
- static GLfloat beta = 0.0f;
- static float fr = 0.0;
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
-
- dojoy();
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- if (usetex)
- glEnable(GL_TEXTURE_2D);
- else
- glDisable(GL_TEXTURE_2D);
-
- 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);
-
- /* Scene */
- glEnable(GL_DEPTH_TEST);
-
- glShadeModel(GL_SMOOTH);
- glBindTexture(GL_TEXTURE_2D, t1id);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- glColor3f(1.0f, 1.0f, 1.0f);
- glEnable(GL_LIGHT0);
- glEnable(GL_LIGHTING);
-
- if (normext)
- glEnable(GL_RESCALE_NORMAL_EXT);
- else
- glEnable(GL_NORMALIZE);
-
- glPushMatrix();
- glRotatef(alpha, 0.0f, 0.0f, 1.0f);
- glRotatef(beta, 1.0f, 0.0f, 0.0f);
- totpoly = 0;
- drawipers(0, FROM_NONE);
- glPopMatrix();
-
- alpha += 4.f * dt;
- beta += 2.4f * dt;
-
- glDisable(GL_LIGHTING);
- glDisable(GL_LIGHT0);
- glShadeModel(GL_FLAT);
-
- if (normext)
- glDisable(GL_RESCALE_NORMAL_EXT);
- else
- glDisable(GL_NORMALIZE);
-
- glCallList(skydlist);
-
- glPopMatrix();
-
- /* Help Screen */
-
- sprintf(frbuf,
- "Frame rate: %0.2f LOD: %d Tot. poly.: %d Poly/sec: %.1f",
- fr, LODbias, totpoly, totpoly * fr);
-
- glDisable(GL_TEXTURE_2D);
- glDisable(GL_FOG);
- glShadeModel(GL_FLAT);
- glDisable(GL_DEPTH_TEST);
-
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
- glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
- glColor3f(1.0, 0.0, 0.0);
- glRasterPos2i(10, 10);
- printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
- glRasterPos2i(350, 470);
- printstring(GLUT_BITMAP_HELVETICA_10,
- "IperS V1.0 Written by David Bucciarelli (tech.hmw@plus.it)");
-
- if (help)
- printhelp();
-
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glMatrixMode(GL_MODELVIEW);
-
- glutSwapBuffers();
-
- Frames++;
- {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 2000) {
- GLfloat seconds = (t - T0) / 1000.0;
- fr = Frames / seconds;
- T0 = t;
- Frames = 0;
- }
- }
-}
-
-int
-main(int ac, char **av)
-{
- float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 };
-
- fprintf(stderr,
- "IperS V1.0\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
-
- glutInitWindowSize(WIDTH, HEIGHT);
- glutInit(&ac, av);
-
- glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
-
- if (!(win = glutCreateWindow("IperS"))) {
- fprintf(stderr, "Error, couldn't open window\n");
- exit(-1);
- }
-
- reshape(WIDTH, HEIGHT);
-
- glShadeModel(GL_SMOOTH);
- glEnable(GL_DEPTH_TEST);
- 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, 0.006);
-
- glHint(GL_FOG_HINT, GL_NICEST);
-
- inittextures();
- initdlists();
- initlight();
-
- glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
- glClear(GL_COLOR_BUFFER_BIT);
-
- calcposobs();
-
- glutReshapeFunc(reshape);
- glutDisplayFunc(draw);
- glutKeyboardFunc(key);
- glutSpecialFunc(special);
- glutIdleFunc(draw);
-
- glutMainLoop();
- cleanup();
-
- return 0;
-}
projects / mesa.git / blobdiff