mirror of https://gitlab.freedesktop.org/mesa/mesa
312 lines
7.0 KiB
C
312 lines
7.0 KiB
C
/*
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* Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that (i) the above copyright notices and this permission notice appear in
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* all copies of the software and related documentation, and (ii) the name of
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* Silicon Graphics may not be used in any advertising or
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* publicity relating to the software without the specific, prior written
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* permission of Silicon Graphics.
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*
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
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* ANY KIND,
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <GL/glut.h>
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GLenum rgb, doubleBuffer;
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#include "tkmap.c"
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double plane[4] = {
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1.0, 0.0, -1.0, 0.0
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};
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float rotX = 5.0, rotY = -5.0, zTranslate = -65.0;
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float fogDensity = 0.02;
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GLint cubeList = 1;
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float scp[18][3] = {
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{
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1.000000, 0.000000, 0.000000
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},
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{
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1.000000, 0.000000, 5.000000
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},
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{
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0.707107, 0.707107, 0.000000
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},
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{
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0.707107, 0.707107, 5.000000
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},
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{
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0.000000, 1.000000, 0.000000
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},
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{
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0.000000, 1.000000, 5.000000
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},
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{
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-0.707107, 0.707107, 0.000000
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},
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{
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-0.707107, 0.707107, 5.000000
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},
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{
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-1.000000, 0.000000, 0.000000
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},
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{
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-1.000000, 0.000000, 5.000000
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},
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{
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-0.707107, -0.707107, 0.000000
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},
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{
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-0.707107, -0.707107, 5.000000
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},
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{
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0.000000, -1.000000, 0.000000
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},
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{
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0.000000, -1.000000, 5.000000
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},
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{
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0.707107, -0.707107, 0.000000
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},
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{
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0.707107, -0.707107, 5.000000
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},
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{
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1.000000, 0.000000, 0.000000
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},
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{
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1.000000, 0.000000, 5.000000
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},
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};
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static void Build_lists(void)
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{
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glNewList(cubeList, GL_COMPILE);
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glBegin(GL_TRIANGLE_STRIP);
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glNormal3fv(scp[0]); glVertex3fv(scp[0]);
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glNormal3fv(scp[0]); glVertex3fv(scp[1]);
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glNormal3fv(scp[2]); glVertex3fv(scp[2]);
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glNormal3fv(scp[2]); glVertex3fv(scp[3]);
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glNormal3fv(scp[4]); glVertex3fv(scp[4]);
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glNormal3fv(scp[4]); glVertex3fv(scp[5]);
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glNormal3fv(scp[6]); glVertex3fv(scp[6]);
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glNormal3fv(scp[6]); glVertex3fv(scp[7]);
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glNormal3fv(scp[8]); glVertex3fv(scp[8]);
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glNormal3fv(scp[8]); glVertex3fv(scp[9]);
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glNormal3fv(scp[10]); glVertex3fv(scp[10]);
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glNormal3fv(scp[10]); glVertex3fv(scp[11]);
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glNormal3fv(scp[12]); glVertex3fv(scp[12]);
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glNormal3fv(scp[12]); glVertex3fv(scp[13]);
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glNormal3fv(scp[14]); glVertex3fv(scp[14]);
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glNormal3fv(scp[14]); glVertex3fv(scp[15]);
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glNormal3fv(scp[16]); glVertex3fv(scp[16]);
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glNormal3fv(scp[16]); glVertex3fv(scp[17]);
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glEnd();
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glEndList();
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}
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static void Init(void)
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{
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static float ambient[] = {0.1, 0.1, 0.1, 1.0};
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static float diffuse[] = {1.0, 1.0, 1.0, 1.0};
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static float position[] = {90.0, 90.0, 0.0, 0.0};
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static float front_mat_shininess[] = {30.0};
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static float front_mat_specular[] = {0.0, 0.0, 0.0, 1.0};
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static float front_mat_diffuse[] = {0.0, 1.0, 0.0, 1.0};
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static float back_mat_shininess[] = {50.0};
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static float back_mat_specular[] = {0.0, 0.0, 1.0, 1.0};
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static float back_mat_diffuse[] = {1.0, 0.0, 0.0, 1.0};
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static float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0};
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static float fog_color[] = {0.8, 0.8, 0.8, 1.0};
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glFrontFace(GL_CW);
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glEnable(GL_DEPTH_TEST);
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glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
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glLightfv(GL_LIGHT0, GL_POSITION, position);
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glMaterialfv(GL_FRONT, GL_SHININESS, front_mat_shininess);
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glMaterialfv(GL_FRONT, GL_SPECULAR, front_mat_specular);
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glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
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glMaterialfv(GL_BACK, GL_SHININESS, back_mat_shininess);
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glMaterialfv(GL_BACK, GL_SPECULAR, back_mat_specular);
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glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
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glEnable(GL_FOG);
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glFogi(GL_FOG_MODE, GL_EXP);
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glFogf(GL_FOG_DENSITY, fogDensity);
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if (rgb) {
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glFogfv(GL_FOG_COLOR, fog_color);
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glClearColor(0.8, 0.8, 0.8, 1.0);
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} else {
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glFogi(GL_FOG_INDEX, 1<<5);
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SetFogRamp(5, 3);
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glClearIndex(128);
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}
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Build_lists();
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}
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static void Reshape(int width, int height)
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{
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glViewport(0, 0, (GLint)width, (GLint)height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0, 1.0, 1.0, 200.0);
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glMatrixMode(GL_MODELVIEW);
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}
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static void Key2(int key, int x, int y)
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{
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switch (key) {
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case GLUT_KEY_UP:
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rotX -= 5;
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break;
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case GLUT_KEY_DOWN:
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rotX += 5;
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break;
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case GLUT_KEY_LEFT:
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rotY -= 5;
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break;
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case GLUT_KEY_RIGHT:
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rotY += 5;
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break;
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default:
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return;
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}
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glutPostRedisplay();
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}
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static void Key(unsigned char key, int x, int y)
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{
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switch (key) {
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case 27:
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exit(1);
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case 'D':
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if (rgb) {
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fogDensity *= 1.10;
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glFogf(GL_FOG_DENSITY, fogDensity);
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}
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break;
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case 'd':
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if (rgb) {
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fogDensity /= 1.10;
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glFogf(GL_FOG_DENSITY, fogDensity);
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}
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break;
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default:
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return;
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}
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glutPostRedisplay();
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}
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static void Draw(void)
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{
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glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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glTranslatef(0, 0, zTranslate);
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glRotatef(rotY, 0,1,0);
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glRotatef(rotX, 1,0,0);
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glScalef(1.0, 1.0, 10.0);
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glCallList(cubeList);
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glPopMatrix();
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glFlush();
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if (doubleBuffer) {
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glutSwapBuffers();
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}
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}
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static GLenum Args(int argc, char **argv)
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{
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GLint i;
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rgb = GL_TRUE;
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doubleBuffer = GL_TRUE;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-ci") == 0) {
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rgb = GL_FALSE;
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} else if (strcmp(argv[i], "-rgb") == 0) {
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rgb = GL_TRUE;
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} else if (strcmp(argv[i], "-sb") == 0) {
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doubleBuffer = GL_FALSE;
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} else if (strcmp(argv[i], "-db") == 0) {
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doubleBuffer = GL_TRUE;
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} else {
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printf("%s (Bad option).\n", argv[i]);
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return GL_FALSE;
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}
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}
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return GL_TRUE;
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}
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int main(int argc, char **argv)
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{
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GLenum type;
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glutInit(&argc, argv);
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if (Args(argc, argv) == GL_FALSE) {
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exit(1);
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}
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glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
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type = GLUT_DEPTH;
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type |= (rgb) ? GLUT_RGB : GLUT_INDEX;
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type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
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glutInitDisplayMode(type);
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if (glutCreateWindow("Fog Test") == GL_FALSE) {
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exit(1);
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}
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InitMap();
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Init();
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glutReshapeFunc(Reshape);
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glutKeyboardFunc(Key);
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glutSpecialFunc(Key2);
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glutDisplayFunc(Draw);
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glutMainLoop();
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return 0;
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}
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