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-rw-r--r--progs/demos/terrain.c658
1 files changed, 0 insertions, 658 deletions
diff --git a/progs/demos/terrain.c b/progs/demos/terrain.c
deleted file mode 100644
index a72c8d3cae..0000000000
--- a/progs/demos/terrain.c
+++ /dev/null
@@ -1,658 +0,0 @@
-/*
- * This program is under the GNU GPL.
- * Use at your own risk.
- *
- * written by David Bucciarelli (tech.hmw@plus.it)
- * Humanware s.r.l.
- *
- * based on a Mikael SkiZoWalker's (MoDEL) / France (Skizo@Hol.Fr) demo
- */
-
-#include <assert.h>
-#include <stdio.h>
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#ifdef WIN32
-#include <windows.h>
-#endif
-
-#include <GL/glut.h>
-
-#ifdef XMESA
-#include "GL/xmesa.h"
-static int fullscreen = 1;
-#endif
-
-#ifndef M_PI
-#define M_PI 3.14159265
-#endif
-
-#define heightMnt 450
-#define lenghtXmnt 62
-#define lenghtYmnt 62
-
-#define stepXmnt 96.0
-#define stepYmnt 96.0
-
-#define WIDTH 640
-#define HEIGHT 480
-
-static GLint T0 = 0;
-static GLint Frames = 0;
-
-#define TSCALE 4
-
-#define FOV 85
-
-static GLfloat terrain[256 * 256];
-static GLfloat terraincolor[256 * 256][3];
-
-static int win = 0;
-
-static int fog = 1;
-static int bfcull = 1;
-static int usetex = 1;
-static int poutline = 0;
-static int help = 1;
-static int joyavailable = 0;
-static int joyactive = 0;
-static float ModZMnt;
-static long GlobalMnt = 0;
-
-static int scrwidth = WIDTH;
-static int scrheight = HEIGHT;
-
-#define OBSSTARTX 992.0
-#define OBSSTARTY 103.0
-
-static float obs[3] = { OBSSTARTX, heightMnt * 1.3, OBSSTARTY };
-static float dir[3], v1[2], v2[2];
-static float v = 900.0;
-static float alpha = 75.0;
-static float beta = 90.0;
-
-static void
-calcposobs(void)
-{
- float alpha1, alpha2;
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
-
- dir[0] = sin(alpha * M_PI / 180.0);
- dir[2] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
- dir[1] = 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;
-
- alpha1 = alpha + FOV / 2.0;
- v1[0] = sin(alpha1 * M_PI / 180.0);
- v1[1] = cos(alpha1 * M_PI / 180.0);
-
- alpha2 = alpha - FOV / 2.0;
- v2[0] = sin(alpha2 * M_PI / 180.0);
- v2[1] = cos(alpha2 * M_PI / 180.0);
-
- obs[0] += v * dir[0] * dt;
- obs[1] += v * dir[1] * dt;
- obs[2] += v * dir[2] * dt;
-
- if (obs[1] < 0.0)
- obs[1] = 0.0;
-}
-
-static void
-reshape(int width, int height)
-{
- scrwidth = width;
- scrheight = height;
- glViewport(0, 0, (GLint) width, (GLint) height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(50.0, ((GLfloat) width / (GLfloat) height),
- lenghtXmnt * stepYmnt * 0.01, lenghtXmnt * stepYmnt * 0.7);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-static int
-clipstrip(float y, float *start, float *end)
-{
- float x1, x2, t1, t2, tmp;
-
- if (v1[1] == 0.0) {
- t1 = 0.0;
- x1 = -HUGE_VAL;
- }
- else {
- t1 = y / v1[1];
- x1 = t1 * v1[0];
- }
-
- if (v2[1] == 0.0) {
- t2 = 0.0;
- x2 = HUGE_VAL;
- }
- else {
- t2 = y / v2[1];
- x2 = t2 * v2[0];
- }
-
- if (((x1 < -(lenghtXmnt * stepXmnt) / 2) && (t2 <= 0.0)) ||
- ((t1 <= 0.0) && (x2 > (lenghtXmnt * stepXmnt) / 2)) ||
- ((t1 < 0.0) && (t2 < 0.0)))
- return 0;
-
- if ((t1 == 0.0) && (t2 == 0.0)) {
- if ((v1[0] < 0.0) && (v1[1] > 0.0) && (v2[0] < 0.0) && (v2[1] < 0.0)) {
- *start = -(lenghtXmnt * stepXmnt) / 2;
- *end = stepXmnt;
- return 1;
- }
- else {
- if ((v1[0] > 0.0) && (v1[1] < 0.0) && (v2[0] > 0.0) && (v2[1] > 0.0)) {
- *start = -stepXmnt;
- *end = (lenghtXmnt * stepXmnt) / 2;
- return 1;
- }
- else
- return 0;
- }
- }
- else {
- if (t2 < 0.0) {
- if (x1 < 0.0)
- x2 = -(lenghtXmnt * stepXmnt) / 2;
- else
- x2 = (lenghtXmnt * stepXmnt) / 2;
- }
-
- if (t1 < 0.0) {
- if (x2 < 0.0)
- x1 = -(lenghtXmnt * stepXmnt) / 2;
- else
- x1 = (lenghtXmnt * stepXmnt) / 2;
- }
- }
-
- if (x1 > x2) {
- tmp = x1;
- x1 = x2;
- x2 = tmp;
- }
-
- x1 -= stepXmnt;
- if (x1 < -(lenghtXmnt * stepXmnt) / 2)
- x1 = -(lenghtXmnt * stepXmnt) / 2;
-
- x2 += stepXmnt;
- if (x2 > (lenghtXmnt * stepXmnt) / 2)
- x2 = (lenghtXmnt * stepXmnt) / 2;
-
- *start = ((int) (x1 / stepXmnt)) * stepXmnt;
- *end = ((int) (x2 / stepXmnt)) * stepXmnt;
-
- return 1;
-}
-
-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);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glColor4f(0.0, 0.0, 0.0, 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, "p - Wire frame");
- glRasterPos2i(60, 270);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
- glRasterPos2i(60, 240);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
- glRasterPos2i(60, 210);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
- glRasterPos2i(60, 180);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
-
- glRasterPos2i(60, 150);
- 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
-drawterrain(void)
-{
- int h, i, idx, ox, oy;
- float j, k, start, end;
-
- ox = (int) (obs[0] / stepXmnt);
- oy = (int) (obs[2] / stepYmnt);
- GlobalMnt = ((ox * TSCALE) & 255) + ((oy * TSCALE) & 255) * 256;
-
- glPushMatrix();
- glTranslatef((float) ox * stepXmnt, 0, (float) oy * stepYmnt);
-
- for (h = 0, k = -(lenghtYmnt * stepYmnt) / 2; h < lenghtYmnt;
- k += stepYmnt, h++) {
- if (!clipstrip(k, &start, &end))
- continue;
-
- glBegin(GL_TRIANGLE_STRIP); /* I hope that the optimizer will be able to improve this code */
- for (i = (int) (lenghtXmnt / 2 + start / stepXmnt), j = start; j <= end;
- j += stepXmnt, i++) {
- idx = (i * TSCALE + h * 256 * TSCALE + GlobalMnt) & 65535;
- glColor3fv(terraincolor[idx]);
- glTexCoord2f((ox + i) / 8.0, (oy + h) / 8.0);
- glVertex3f(j, terrain[idx], k);
-
- idx =
- (i * TSCALE + h * 256 * TSCALE + 256 * TSCALE +
- GlobalMnt) & 65535;
- glColor3fv(terraincolor[idx]);
- glTexCoord2f((ox + i) / 8.0, (oy + h + 1) / 8.0);
- glVertex3f(j, terrain[idx], k + stepYmnt);
- }
- glEnd();
- }
-
- glDisable(GL_CULL_FACE);
- glDisable(GL_TEXTURE_2D);
- glEnable(GL_BLEND);
- glBegin(GL_QUADS);
- glColor4f(0.1, 0.7, 1.0, 0.4);
- glVertex3f(-(lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
- -(lenghtYmnt * stepYmnt) / 2.0);
- glVertex3f(-(lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
- (lenghtYmnt * stepYmnt) / 2.0);
- glVertex3f((lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
- (lenghtYmnt * stepYmnt) / 2.0);
- glVertex3f((lenghtXmnt * stepXmnt) / 2.0, heightMnt * 0.6,
- -(lenghtYmnt * stepYmnt) / 2.0);
- glEnd();
- glDisable(GL_BLEND);
- if (bfcull)
- glEnable(GL_CULL_FACE);
- glEnable(GL_TEXTURE_2D);
-
- 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 += 0.5;
- if (joy.wButtons & JOY_BUTTON2)
- v -= 0.5;
- }
- }
- else
- joyavailable = 0;
-#endif
-}
-
-static void
-drawscene(void)
-{
- static char frbuf[80] = "";
-
- dojoy();
-
- glShadeModel(GL_SMOOTH);
- glEnable(GL_DEPTH_TEST);
-
- if (usetex)
- glEnable(GL_TEXTURE_2D);
- else
- glDisable(GL_TEXTURE_2D);
-
- if (fog)
- glEnable(GL_FOG);
- else
- glDisable(GL_FOG);
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
-
- calcposobs();
- gluLookAt(obs[0], obs[1], obs[2],
- obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
- 0.0, 1.0, 0.0);
-
- drawterrain();
- glPopMatrix();
-
- glDisable(GL_TEXTURE_2D);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_FOG);
- glShadeModel(GL_FLAT);
-
- glMatrixMode(GL_PROJECTION);
- 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,
- "Terrain V1.2 Written by David Bucciarelli (tech.hmw@plus.it)");
- glRasterPos2i(434, 457);
- printstring(GLUT_BITMAP_HELVETICA_10,
- "Based on a Mickael's demo (Skizo@Hol.Fr)");
-
- if (help)
- printhelp();
-
- reshape(scrwidth, scrheight);
-
- 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
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27:
- exit(0);
- break;
- case 'a':
- v += 50.;
- break;
- case 'z':
- v -= 50.;
- 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;
- case 'j':
- joyactive = (!joyactive);
- break;
- case 'h':
- help = (!help);
- break;
- case 'f':
- fog = (!fog);
- break;
- case 't':
- usetex = (!usetex);
- break;
- case 'b':
- if (bfcull) {
- glDisable(GL_CULL_FACE);
- bfcull = 0;
- }
- else {
- glEnable(GL_CULL_FACE);
- bfcull = 1;
- }
- break;
-#ifdef XMESA
- case ' ':
- XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
- fullscreen = (!fullscreen);
- break;
-#endif
- }
-}
-
-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
-calccolor(GLfloat height, GLfloat c[3])
-{
- GLfloat color[4][3] = {
- {1.0, 1.0, 1.0},
- {0.0, 0.8, 0.0},
- {1.0, 1.0, 0.3},
- {0.0, 0.0, 0.8}
- };
- GLfloat fact;
-
- height = height * (1.0 / 255.0);
-
- if (height >= 0.9) {
- c[0] = color[0][0];
- c[1] = color[0][1];
- c[2] = color[0][2];
- return;
- }
-
- if ((height < 0.9) && (height >= 0.7)) {
- fact = (height - 0.7) * 5.0;
- c[0] = fact * color[0][0] + (1.0 - fact) * color[1][0];
- c[1] = fact * color[0][1] + (1.0 - fact) * color[1][1];
- c[2] = fact * color[0][2] + (1.0 - fact) * color[1][2];
- return;
- }
-
- if ((height < 0.7) && (height >= 0.6)) {
- fact = (height - 0.6) * 10.0;
- c[0] = fact * color[1][0] + (1.0 - fact) * color[2][0];
- c[1] = fact * color[1][1] + (1.0 - fact) * color[2][1];
- c[2] = fact * color[1][2] + (1.0 - fact) * color[2][2];
- return;
- }
-
- if ((height < 0.6) && (height >= 0.5)) {
- fact = (height - 0.5) * 10.0;
- c[0] = fact * color[2][0] + (1.0 - fact) * color[3][0];
- c[1] = fact * color[2][1] + (1.0 - fact) * color[3][1];
- c[2] = fact * color[2][2] + (1.0 - fact) * color[3][2];
- return;
- }
-
- c[0] = color[3][0];
- c[1] = color[3][1];
- c[2] = color[3][2];
-}
-
-static void
-loadpic(void)
-{
- GLubyte bufferter[256 * 256], terrainpic[256 * 256];
- FILE *FilePic;
- int i, tmp;
- GLenum gluerr;
- size_t result;
-
- if ((FilePic = fopen("terrain.dat", "r")) == NULL) {
- fprintf(stderr, "Error loading terrain.dat\n");
- exit(-1);
- }
- result = fread(bufferter, 256 * 256, 1, FilePic);
- assert(result == 1);
- fclose(FilePic);
-
- for (i = 0; i < (256 * 256); i++) {
- terrain[i] = (bufferter[i] * (heightMnt / 255.0f));
- calccolor((GLfloat) bufferter[i], terraincolor[i]);
- tmp = (((int) bufferter[i]) + 96);
- terrainpic[i] = (tmp > 255) ? 255 : tmp;
- }
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 1, 256, 256, GL_LUMINANCE,
- GL_UNSIGNED_BYTE,
- (GLvoid *) (&terrainpic[0])))) {
- 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);
-
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- glEnable(GL_TEXTURE_2D);
-}
-
-static void
-init(void)
-{
- float fogcolor[4] = { 0.6, 0.7, 0.7, 1.0 };
-
- glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
- glClearDepth(1.0);
- glDepthFunc(GL_LEQUAL);
- glShadeModel(GL_SMOOTH);
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_CULL_FACE);
-
- glDisable(GL_BLEND);
- 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, 0.0007);
-#ifdef FX
- glHint(GL_FOG_HINT, GL_NICEST);
-#endif
-
- reshape(scrwidth, scrheight);
-}
-
-
-int
-main(int ac, char **av)
-{
- glutInitWindowSize(WIDTH, HEIGHT);
- glutInit(&ac, av);
-
- glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
-
- if (!(win = glutCreateWindow("Terrain"))) {
- fprintf(stderr, "Error, couldn't open window\n");
- return -1;
- }
-
- ModZMnt = 0.0f;
- loadpic();
-
- init();
-
-#ifndef FX
- glDisable(GL_TEXTURE_2D);
- usetex = 0;
-#endif
-
- glutReshapeFunc(reshape);
- glutDisplayFunc(drawscene);
- glutKeyboardFunc(key);
- glutSpecialFunc(special);
- glutIdleFunc(drawscene);
-
- glutMainLoop();
-
- return 0;
-}
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