evaltest.c
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上传日期:2007-05-28
资源大小:4876k
文件大小:11k
- /* Copyright (c) Mark J. Kilgard, 1996. */
- /* This program is freely distributable without licensing fees
- and is provided without guarantee or warrantee expressed or
- implied. This program is -not- in the public domain. */
- /* This program was originally written by someone else (Simon Hui?);
- I just added a bit more GLUT stuff to it. */
- #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;
- }
- 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:;
- /* Mesa makes GLenum be a C "enum" and gcc will warn if
- all the cases of an enum are not tested in a switch
- statement. Add default case to supress the error. */
- }
- break;
- }
- }
- static void
- Reshape(int width, int height)
- {
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 10.0);
- glMatrixMode(GL_MODELVIEW);
- }
- /* ARGSUSED1 */
- static void
- Key(unsigned char key, int x, int y)
- {
- switch (key) {
- case '1':
- arrayType = ONE_D;
- glDisable(GL_AUTO_NORMAL);
- glutPostRedisplay();
- break;
- case '2':
- arrayType = TWO_D;
- glEnable(GL_AUTO_NORMAL);
- glutPostRedisplay();
- break;
- case '3':
- mapType = EVAL;
- glutPostRedisplay();
- break;
- case '4':
- mapType = MESH;
- glutPostRedisplay();
- break;
- case '5':
- polygonFilled = !polygonFilled;
- glutPostRedisplay();
- break;
- case '6':
- mapPoint = !mapPoint;
- glutPostRedisplay();
- break;
- case '7':
- colorType = !colorType;
- glutPostRedisplay();
- break;
- case '8':
- textureType = !textureType;
- glutPostRedisplay();
- break;
- case '9':
- lighting = !lighting;
- if (lighting) {
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- if (arrayType == TWO_D) {
- glEnable(GL_AUTO_NORMAL);
- } else {
- glDisable(GL_AUTO_NORMAL);
- }
- } else {
- glDisable(GL_LIGHTING);
- glDisable(GL_LIGHT0);
- glDisable(GL_AUTO_NORMAL);
- }
- glutPostRedisplay();
- break;
- case 27: /* Escape key. */
- exit(0);
- }
- }
- static void
- Menu(int value)
- {
- /* Menu items have key values assigned to them. Just pass
- this value to the key routine. */
- Key((unsigned char) value, 0, 0);
- }
- /* ARGSUSED1 */
- static void
- SpecialKey(int key, int x, int y)
- {
- switch (key) {
- case GLUT_KEY_LEFT:
- rotY -= 30;
- glutPostRedisplay();
- break;
- case GLUT_KEY_RIGHT:
- rotY += 30;
- glutPostRedisplay();
- break;
- case GLUT_KEY_UP:
- rotX -= 30;
- glutPostRedisplay();
- break;
- case GLUT_KEY_DOWN:
- rotX += 30;
- glutPostRedisplay();
- break;
- }
- }
- 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();
- if (doubleBuffer) {
- glutSwapBuffers();
- } else {
- glFlush();
- }
- }
- static void
- 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;
- }
- }
- }
- int
- main(int argc, char **argv)
- {
- GLenum type;
- glutInit(&argc, argv);
- Args(argc, argv);
- type = GLUT_RGB | GLUT_DEPTH;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
- glutInitWindowSize(300, 300);
- glutCreateWindow("Evaluator Test");
- glutCreateMenu(Menu);
- glutAddMenuEntry("One dimensional", '1');
- glutAddMenuEntry("Two dimensional", '2');
- glutAddMenuEntry("Eval map type", '3');
- glutAddMenuEntry("Mesh map type", '4');
- glutAddMenuEntry("Toggle filled", '5');
- glutAddMenuEntry("Toggle map point", '6');
- glutAddMenuEntry("Toggle color", '7');
- glutAddMenuEntry("Toggle texture", '8');
- glutAddMenuEntry("Toggle lighting", '9');
- glutAddMenuEntry("Quit", 27);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
- glutAttachMenu(GLUT_LEFT_BUTTON);
- Init();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
- }