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