473 lines
10 KiB
C
473 lines
10 KiB
C
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/*
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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 <math.h>
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#include <GL/glut.h>
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#define VORDER 10
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#define CORDER 10
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#define TORDER 3
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#define VMAJOR_ORDER 2
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#define VMINOR_ORDER 3
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#define CMAJOR_ORDER 2
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#define CMINOR_ORDER 2
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#define TMAJOR_ORDER 2
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#define TMINOR_ORDER 2
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#define VDIM 4
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#define CDIM 4
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#define TDIM 2
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#define ONE_D 1
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#define TWO_D 2
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#define EVAL 3
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#define MESH 4
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GLenum doubleBuffer;
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float rotX = 0.0, rotY = 0.0, translateZ = -1.0;
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GLenum arrayType = ONE_D;
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GLenum colorType = GL_FALSE;
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GLenum textureType = GL_FALSE;
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GLenum polygonFilled = GL_FALSE;
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GLenum lighting = GL_FALSE;
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GLenum mapPoint = GL_FALSE;
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GLenum mapType = EVAL;
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double point1[10*4] = {
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-0.5, 0.0, 0.0, 1.0,
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-0.4, 0.5, 0.0, 1.0,
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-0.3,-0.5, 0.0, 1.0,
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-0.2, 0.5, 0.0, 1.0,
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-0.1,-0.5, 0.0, 1.0,
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0.0, 0.5, 0.0, 1.0,
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0.1,-0.5, 0.0, 1.0,
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0.2, 0.5, 0.0, 1.0,
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0.3,-0.5, 0.0, 1.0,
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0.4, 0.0, 0.0, 1.0,
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};
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double cpoint1[10*4] = {
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0.0, 0.0, 1.0, 1.0,
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0.3, 0.0, 0.7, 1.0,
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0.6, 0.0, 0.3, 1.0,
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1.0, 0.0, 0.0, 1.0,
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1.0, 0.3, 0.0, 1.0,
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1.0, 0.6, 0.0, 1.0,
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1.0, 1.0, 0.0, 1.0,
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1.0, 1.0, 0.5, 1.0,
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1.0, 1.0, 1.0, 1.0,
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};
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double tpoint1[11*4] = {
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0.0, 0.0, 0.0, 1.0,
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0.0, 0.1, 0.0, 1.0,
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0.0, 0.2, 0.0, 1.0,
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0.0, 0.3, 0.0, 1.0,
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0.0, 0.4, 0.0, 1.0,
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0.0, 0.5, 0.0, 1.0,
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0.0, 0.6, 0.0, 1.0,
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0.0, 0.7, 0.0, 1.0,
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0.0, 0.8, 0.0, 1.0,
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0.0, 0.9, 0.0, 1.0,
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};
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double point2[2*3*4] = {
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-0.5, -0.5, 0.5, 1.0,
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0.0, 1.0, 0.5, 1.0,
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0.5, -0.5, 0.5, 1.0,
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-0.5, 0.5, -0.5, 1.0,
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0.0, -1.0, -0.5, 1.0,
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0.5, 0.5, -0.5, 1.0,
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};
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double cpoint2[2*2*4] = {
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0.0, 0.0, 0.0, 1.0,
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0.0, 0.0, 1.0, 1.0,
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0.0, 1.0, 0.0, 1.0,
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1.0, 1.0, 1.0, 1.0,
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};
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double tpoint2[2*2*2] = {
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0.0, 0.0, 0.0, 1.0,
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1.0, 0.0, 1.0, 1.0,
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};
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float textureImage[4*2*4] = {
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1.0, 1.0, 1.0, 1.0,
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1.0, 0.0, 0.0, 1.0,
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1.0, 0.0, 0.0, 1.0,
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1.0, 1.0, 1.0, 1.0,
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1.0, 1.0, 1.0, 1.0,
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1.0, 0.0, 0.0, 1.0,
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1.0, 0.0, 0.0, 1.0,
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1.0, 1.0, 1.0, 1.0,
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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[] = {0.0, 0.0, -150.0, 0.0};
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static float front_mat_diffuse[] = {1.0, 0.2, 1.0, 1.0};
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static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
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static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
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static float lmodel_twoside[] = {GL_TRUE};
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static float decal[] = {GL_DECAL};
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static float repeat[] = {GL_REPEAT};
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static float nr[] = {GL_NEAREST};
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glFrontFace(GL_CCW);
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glEnable(GL_DEPTH_TEST);
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glMap1d(GL_MAP1_VERTEX_4, 0.0, 1.0, VDIM, VORDER, point1);
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glMap1d(GL_MAP1_COLOR_4, 0.0, 1.0, CDIM, CORDER, cpoint1);
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glMap2d(GL_MAP2_VERTEX_4, 0.0, 1.0, VMINOR_ORDER*VDIM, VMAJOR_ORDER, 0.0,
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1.0, VDIM, VMINOR_ORDER, point2);
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glMap2d(GL_MAP2_COLOR_4, 0.0, 1.0, CMINOR_ORDER*CDIM, CMAJOR_ORDER, 0.0,
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1.0, CDIM, CMINOR_ORDER, cpoint2);
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glMap2d(GL_MAP2_TEXTURE_COORD_2, 0.0, 1.0, TMINOR_ORDER*TDIM,
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TMAJOR_ORDER, 0.0, 1.0, TDIM, TMINOR_ORDER, tpoint2);
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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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glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
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glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
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glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
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glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, repeat);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, repeat);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, nr);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, nr);
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glTexImage2D(GL_TEXTURE_2D, 0, 4, 2, 4, 0, GL_RGBA, GL_FLOAT,
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(GLvoid *)textureImage);
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}
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static void DrawPoints1(void)
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{
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GLint i;
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glColor3f(0.0, 1.0, 0.0);
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glPointSize(2);
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glBegin(GL_POINTS);
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for (i = 0; i < VORDER; i++) {
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glVertex4dv(&point1[i*4]);
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}
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glEnd();
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}
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static void DrawPoints2(void)
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{
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GLint i, j;
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glColor3f(1.0, 0.0, 1.0);
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glPointSize(2);
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glBegin(GL_POINTS);
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for (i = 0; i < VMAJOR_ORDER; i++) {
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for (j = 0; j < VMINOR_ORDER; j++) {
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glVertex4dv(&point2[i*4*VMINOR_ORDER+j*4]);
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}
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}
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glEnd();
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}
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static void DrawMapEval1(float du)
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{
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float u;
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glColor3f(1.0, 0.0, 0.0);
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glBegin(GL_LINE_STRIP);
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for (u = 0.0; u < 1.0; u += du) {
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glEvalCoord1d(u);
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}
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glEvalCoord1d(1.0);
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glEnd();
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}
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static void DrawMapEval2(float du, float dv)
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{
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float u, v, tmp;
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glColor3f(1.0, 0.0, 0.0);
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for (v = 0.0; v < 1.0; v += dv) {
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glBegin(GL_QUAD_STRIP);
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for (u = 0.0; u <= 1.0; u += du) {
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glEvalCoord2d(u,v);
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tmp = (v + dv < 1.0) ? (v + dv) : 1.0;
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glEvalCoord2d(u, tmp);
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}
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glEvalCoord2d(1.0, v);
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glEvalCoord2d(1.0, v+dv);
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glEnd();
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}
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}
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static void RenderEval(void)
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{
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if (colorType) {
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glEnable(GL_MAP1_COLOR_4);
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glEnable(GL_MAP2_COLOR_4);
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} else {
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glDisable(GL_MAP1_COLOR_4);
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glDisable(GL_MAP2_COLOR_4);
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}
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if (textureType) {
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_MAP2_TEXTURE_COORD_2);
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} else {
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_MAP2_TEXTURE_COORD_2);
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}
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if (polygonFilled) {
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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} else {
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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}
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glShadeModel(GL_SMOOTH);
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switch (mapType) {
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case EVAL:
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switch (arrayType) {
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case ONE_D:
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glDisable(GL_MAP2_VERTEX_4);
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glEnable(GL_MAP1_VERTEX_4);
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DrawPoints1();
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DrawMapEval1(0.1/VORDER);
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break;
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case TWO_D:
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glDisable(GL_MAP1_VERTEX_4);
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glEnable(GL_MAP2_VERTEX_4);
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DrawPoints2();
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DrawMapEval2(0.1/VMAJOR_ORDER,0.1/VMINOR_ORDER);
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break;
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default:
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break;
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}
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break;
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case MESH:
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switch (arrayType) {
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case ONE_D:
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DrawPoints1();
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glDisable(GL_MAP2_VERTEX_4);
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glEnable (GL_MAP1_VERTEX_4);
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glColor3f(0.0, 0.0, 1.0);
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glMapGrid1d(40, 0.0, 1.0);
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if (mapPoint) {
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glPointSize(2);
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glEvalMesh1(GL_POINT, 0, 40);
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} else {
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glEvalMesh1(GL_LINE, 0, 40);
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}
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break;
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case TWO_D:
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DrawPoints2();
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glDisable(GL_MAP1_VERTEX_4);
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glEnable(GL_MAP2_VERTEX_4);
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glColor3f(0.0, 0.0, 1.0);
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glMapGrid2d(20, 0.0, 1.0, 20, 0.0, 1.0);
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if (mapPoint) {
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glPointSize(2);
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glEvalMesh2(GL_POINT, 0, 20, 0, 20);
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} else if (polygonFilled) {
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glEvalMesh2(GL_FILL, 0, 20, 0, 20);
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} else {
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glEvalMesh2(GL_LINE, 0, 20, 0, 20);
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}
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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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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glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 10.0);
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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_LEFT:
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rotY -= 30;
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break;
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case GLUT_KEY_RIGHT:
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rotY += 30;
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break;
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case GLUT_KEY_UP:
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rotX -= 30;
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break;
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case GLUT_KEY_DOWN:
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rotX += 30;
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break;
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default:
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return;
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}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|