| /* |
| * 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 <math.h> |
| #include <GL/glut.h> |
| |
| |
| #define VORDER 10 |
| #define CORDER 10 |
| #define TORDER 3 |
| |
| #define VMAJOR_ORDER 2 |
| #define VMINOR_ORDER 3 |
| |
| #define CMAJOR_ORDER 2 |
| #define CMINOR_ORDER 2 |
| |
| #define TMAJOR_ORDER 2 |
| #define TMINOR_ORDER 2 |
| |
| #define VDIM 4 |
| #define CDIM 4 |
| #define TDIM 2 |
| |
| #define ONE_D 1 |
| #define TWO_D 2 |
| |
| #define EVAL 3 |
| #define MESH 4 |
| |
| |
| GLenum doubleBuffer; |
| |
| float rotX = 0.0, rotY = 0.0, translateZ = -1.0; |
| |
| GLenum arrayType = ONE_D; |
| GLenum colorType = GL_FALSE; |
| GLenum textureType = GL_FALSE; |
| GLenum polygonFilled = GL_FALSE; |
| GLenum lighting = GL_FALSE; |
| GLenum mapPoint = GL_FALSE; |
| GLenum mapType = EVAL; |
| |
| double point1[10*4] = { |
| -0.5, 0.0, 0.0, 1.0, |
| -0.4, 0.5, 0.0, 1.0, |
| -0.3,-0.5, 0.0, 1.0, |
| -0.2, 0.5, 0.0, 1.0, |
| -0.1,-0.5, 0.0, 1.0, |
| 0.0, 0.5, 0.0, 1.0, |
| 0.1,-0.5, 0.0, 1.0, |
| 0.2, 0.5, 0.0, 1.0, |
| 0.3,-0.5, 0.0, 1.0, |
| 0.4, 0.0, 0.0, 1.0, |
| }; |
| double cpoint1[10*4] = { |
| 0.0, 0.0, 1.0, 1.0, |
| 0.3, 0.0, 0.7, 1.0, |
| 0.6, 0.0, 0.3, 1.0, |
| 1.0, 0.0, 0.0, 1.0, |
| 1.0, 0.3, 0.0, 1.0, |
| 1.0, 0.6, 0.0, 1.0, |
| 1.0, 1.0, 0.0, 1.0, |
| 1.0, 1.0, 0.5, 1.0, |
| 1.0, 1.0, 1.0, 1.0, |
| }; |
| double tpoint1[11*4] = { |
| 0.0, 0.0, 0.0, 1.0, |
| 0.0, 0.1, 0.0, 1.0, |
| 0.0, 0.2, 0.0, 1.0, |
| 0.0, 0.3, 0.0, 1.0, |
| 0.0, 0.4, 0.0, 1.0, |
| 0.0, 0.5, 0.0, 1.0, |
| 0.0, 0.6, 0.0, 1.0, |
| 0.0, 0.7, 0.0, 1.0, |
| 0.0, 0.8, 0.0, 1.0, |
| 0.0, 0.9, 0.0, 1.0, |
| }; |
| double point2[2*3*4] = { |
| -0.5, -0.5, 0.5, 1.0, |
| 0.0, 1.0, 0.5, 1.0, |
| 0.5, -0.5, 0.5, 1.0, |
| -0.5, 0.5, -0.5, 1.0, |
| 0.0, -1.0, -0.5, 1.0, |
| 0.5, 0.5, -0.5, 1.0, |
| }; |
| double cpoint2[2*2*4] = { |
| 0.0, 0.0, 0.0, 1.0, |
| 0.0, 0.0, 1.0, 1.0, |
| 0.0, 1.0, 0.0, 1.0, |
| 1.0, 1.0, 1.0, 1.0, |
| }; |
| double tpoint2[2*2*2] = { |
| 0.0, 0.0, 0.0, 1.0, |
| 1.0, 0.0, 1.0, 1.0, |
| }; |
| float textureImage[4*2*4] = { |
| 1.0, 1.0, 1.0, 1.0, |
| 1.0, 0.0, 0.0, 1.0, |
| 1.0, 0.0, 0.0, 1.0, |
| 1.0, 1.0, 1.0, 1.0, |
| 1.0, 1.0, 1.0, 1.0, |
| 1.0, 0.0, 0.0, 1.0, |
| 1.0, 0.0, 0.0, 1.0, |
| 1.0, 1.0, 1.0, 1.0, |
| }; |
| |
| |
| 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[] = {0.0, 0.0, -150.0, 0.0}; |
| static float front_mat_diffuse[] = {1.0, 0.2, 1.0, 1.0}; |
| static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0}; |
| static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0}; |
| static float lmodel_twoside[] = {GL_TRUE}; |
| static float decal[] = {GL_DECAL}; |
| static float repeat[] = {GL_REPEAT}; |
| static float nr[] = {GL_NEAREST}; |
| |
| glFrontFace(GL_CCW); |
| |
| glEnable(GL_DEPTH_TEST); |
| |
| glMap1d(GL_MAP1_VERTEX_4, 0.0, 1.0, VDIM, VORDER, point1); |
| glMap1d(GL_MAP1_COLOR_4, 0.0, 1.0, CDIM, CORDER, cpoint1); |
| |
| glMap2d(GL_MAP2_VERTEX_4, 0.0, 1.0, VMINOR_ORDER*VDIM, VMAJOR_ORDER, 0.0, |
| 1.0, VDIM, VMINOR_ORDER, point2); |
| glMap2d(GL_MAP2_COLOR_4, 0.0, 1.0, CMINOR_ORDER*CDIM, CMAJOR_ORDER, 0.0, |
| 1.0, CDIM, CMINOR_ORDER, cpoint2); |
| glMap2d(GL_MAP2_TEXTURE_COORD_2, 0.0, 1.0, TMINOR_ORDER*TDIM, |
| TMAJOR_ORDER, 0.0, 1.0, TDIM, TMINOR_ORDER, tpoint2); |
| |
| glLightfv(GL_LIGHT0, GL_AMBIENT, ambient); |
| glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse); |
| glLightfv(GL_LIGHT0, GL_POSITION, position); |
| |
| glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse); |
| glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse); |
| |
| glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient); |
| glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside); |
| |
| glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal); |
| glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat); |
| glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat); |
| glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nr); |
| glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nr); |
| glTexImage2D(GL_TEXTURE_2D, 0, 4, 2, 4, 0, GL_RGBA, GL_FLOAT, |
| (GLvoid *)textureImage); |
| } |
| |
| static void DrawPoints1(void) |
| { |
| GLint i; |
| |
| glColor3f(0.0, 1.0, 0.0); |
| glPointSize(2); |
| glBegin(GL_POINTS); |
| for (i = 0; i < VORDER; i++) { |
| glVertex4dv(&point1[i*4]); |
| } |
| glEnd(); |
| } |
| |
| static void DrawPoints2(void) |
| { |
| GLint i, j; |
| |
| glColor3f(1.0, 0.0, 1.0); |
| glPointSize(2); |
| glBegin(GL_POINTS); |
| for (i = 0; i < VMAJOR_ORDER; i++) { |
| for (j = 0; j < VMINOR_ORDER; j++) { |
| glVertex4dv(&point2[i*4*VMINOR_ORDER+j*4]); |
| } |
| } |
| glEnd(); |
| } |
| |
| static void DrawMapEval1(float du) |
| { |
| float u; |
| |
| glColor3f(1.0, 0.0, 0.0); |
| glBegin(GL_LINE_STRIP); |
| for (u = 0.0; u < 1.0; u += du) { |
| glEvalCoord1d(u); |
| } |
| glEvalCoord1d(1.0); |
| glEnd(); |
| } |
| |
| static void DrawMapEval2(float du, float dv) |
| { |
| float u, v, tmp; |
| |
| glColor3f(1.0, 0.0, 0.0); |
| for (v = 0.0; v < 1.0; v += dv) { |
| glBegin(GL_QUAD_STRIP); |
| for (u = 0.0; u <= 1.0; u += du) { |
| glEvalCoord2d(u,v); |
| tmp = (v + dv < 1.0) ? (v + dv) : 1.0; |
| glEvalCoord2d(u, tmp); |
| } |
| glEvalCoord2d(1.0, v); |
| glEvalCoord2d(1.0, v+dv); |
| glEnd(); |
| } |
| } |
| |
| static void RenderEval(void) |
| { |
| |
| if (colorType) { |
| glEnable(GL_MAP1_COLOR_4); |
| glEnable(GL_MAP2_COLOR_4); |
| } else { |
| glDisable(GL_MAP1_COLOR_4); |
| glDisable(GL_MAP2_COLOR_4); |
| } |
| |
| if (textureType) { |
| glEnable(GL_TEXTURE_2D); |
| glEnable(GL_MAP2_TEXTURE_COORD_2); |
| } else { |
| glDisable(GL_TEXTURE_2D); |
| glDisable(GL_MAP2_TEXTURE_COORD_2); |
| } |
| |
| if (polygonFilled) { |
| glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
| } else { |
| glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); |
| } |
| |
| glShadeModel(GL_SMOOTH); |
| |
| switch (mapType) { |
| case EVAL: |
| switch (arrayType) { |
| case ONE_D: |
| glDisable(GL_MAP2_VERTEX_4); |
| glEnable(GL_MAP1_VERTEX_4); |
| DrawPoints1(); |
| DrawMapEval1(0.1/VORDER); |
| break; |
| case TWO_D: |
| glDisable(GL_MAP1_VERTEX_4); |
| glEnable(GL_MAP2_VERTEX_4); |
| DrawPoints2(); |
| DrawMapEval2(0.1/VMAJOR_ORDER,0.1/VMINOR_ORDER); |
| break; |
| default: |
| break; |
| } |
| break; |
| case MESH: |
| switch (arrayType) { |
| case ONE_D: |
| DrawPoints1(); |
| glDisable(GL_MAP2_VERTEX_4); |
| glEnable (GL_MAP1_VERTEX_4); |
| glColor3f(0.0, 0.0, 1.0); |
| glMapGrid1d(40, 0.0, 1.0); |
| if (mapPoint) { |
| glPointSize(2); |
| glEvalMesh1(GL_POINT, 0, 40); |
| } else { |
| glEvalMesh1(GL_LINE, 0, 40); |
| } |
| break; |
| case TWO_D: |
| DrawPoints2(); |
| glDisable(GL_MAP1_VERTEX_4); |
| glEnable(GL_MAP2_VERTEX_4); |
| glColor3f(0.0, 0.0, 1.0); |
| glMapGrid2d(20, 0.0, 1.0, 20, 0.0, 1.0); |
| if (mapPoint) { |
| glPointSize(2); |
| glEvalMesh2(GL_POINT, 0, 20, 0, 20); |
| } else if (polygonFilled) { |
| glEvalMesh2(GL_FILL, 0, 20, 0, 20); |
| } else { |
| glEvalMesh2(GL_LINE, 0, 20, 0, 20); |
| } |
| break; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void Reshape(int width, int height) |
| { |
| |
| glViewport(0, 0, (GLint)width, (GLint)height); |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 10.0); |
| glMatrixMode(GL_MODELVIEW); |
| } |
| |
| static void Key2(int key, int x, int y) |
| { |
| switch (key) { |
| case GLUT_KEY_LEFT: |
| rotY -= 30; |
| break; |
| case GLUT_KEY_RIGHT: |
| rotY += 30; |
| break; |
| case GLUT_KEY_UP: |
| rotX -= 30; |
| break; |
| case GLUT_KEY_DOWN: |
| rotX += 30; |
| break; |
| default: |
| return; |
| } |
| |
| glutPostRedisplay(); |
| } |
| |
| static void Key(unsigned char key, int x, int y) |
| { |
| switch (key) { |
| case 27: |
| exit(1); |
| case '1': |
| arrayType = ONE_D; |
| break; |
| case '2': |
| arrayType = TWO_D; |
| break; |
| case 'e': |
| mapType = EVAL; |
| break; |
| case 'm': |
| mapType = MESH; |
| break; |
| case 'f': |
| polygonFilled = !polygonFilled; |
| break; |
| case 'p': |
| mapPoint = !mapPoint; |
| break; |
| case 'c': |
| colorType = !colorType; |
| break; |
| case 't': |
| textureType = !textureType; |
| break; |
| case 'l': |
| lighting =! lighting; |
| if (lighting) { |
| glEnable(GL_LIGHTING); |
| glEnable(GL_LIGHT0); |
| glEnable(GL_AUTO_NORMAL); |
| } else { |
| glDisable(GL_LIGHTING); |
| glDisable(GL_LIGHT0); |
| glDisable(GL_AUTO_NORMAL); |
| } |
| break; |
| default: |
| return; |
| } |
| |
| glutPostRedisplay(); |
| } |
| |
| static void Draw(void) |
| { |
| |
| glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); |
| |
| glPushMatrix(); |
| |
| glTranslatef(0.0, 0.0 , translateZ); |
| glRotatef(rotX, 1, 0, 0); |
| glRotatef(rotY, 0, 1, 0); |
| RenderEval(); |
| |
| glPopMatrix(); |
| |
| glFlush(); |
| |
| if (doubleBuffer) { |
| glutSwapBuffers(); |
| } |
| } |
| |
| static GLenum Args(int argc, char **argv) |
| { |
| GLint i; |
| |
| doubleBuffer = GL_FALSE; |
| |
| for (i = 1; i < argc; i++) { |
| 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_RGB | GLUT_DEPTH; |
| type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; |
| glutInitDisplayMode(type); |
| |
| if (glutCreateWindow("Evaluator Test") == GL_FALSE) { |
| exit(1); |
| } |
| |
| Init(); |
| |
| glutReshapeFunc(Reshape); |
| glutKeyboardFunc(Key); |
| glutSpecialFunc(Key2); |
| glutDisplayFunc(Draw); |
| glutMainLoop(); |
| return 0; |
| } |