+++ /dev/null
-/*
- * 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 <stdlib.h>
-#include <math.h>
-#include <string.h>
-#include <time.h>
-#include <GL/glut.h>
-
-
-#define MAXOBJS 10000
-#define MAXSELECT 100
-#define MAXFEED 300
-#define SOLID 1
-#define LINE 2
-#define POINT 3
-
-
-GLint windW, windH;
-
-GLuint selectBuf[MAXSELECT];
-GLfloat feedBuf[MAXFEED];
-GLint vp[4];
-float zRotation = 90.0;
-float zoom = 1.0;
-GLint objectCount;
-GLint numObjects;
-struct object {
- float v1[2];
- float v2[2];
- float v3[2];
- float color[3];
-} objects[MAXOBJS];
-GLenum linePoly = GL_FALSE;
-
-
-static void InitObjects(GLint num)
-{
- GLint i;
- float x, y;
-
- if (num > MAXOBJS) {
- num = MAXOBJS;
- }
- if (num < 1) {
- num = 1;
- }
- objectCount = num;
-
- srand((unsigned int)time(NULL));
- for (i = 0; i < num; i++) {
- x = (rand() % 300) - 150;
- y = (rand() % 300) - 150;
-
- objects[i].v1[0] = x + (rand() % 50) - 25;
- objects[i].v2[0] = x + (rand() % 50) - 25;
- objects[i].v3[0] = x + (rand() % 50) - 25;
- objects[i].v1[1] = y + (rand() % 50) - 25;
- objects[i].v2[1] = y + (rand() % 50) - 25;
- objects[i].v3[1] = y + (rand() % 50) - 25;
- objects[i].color[0] = ((rand() % 100) + 50) / 150.0;
- objects[i].color[1] = ((rand() % 100) + 50) / 150.0;
- objects[i].color[2] = ((rand() % 100) + 50) / 150.0;
- }
-}
-
-static void Init(void)
-{
-
- numObjects = 10;
- InitObjects(numObjects);
- glGetIntegerv(GL_VIEWPORT, vp);
-
-#if 0 /* debug - test culling */
- glCullFace(GL_BACK);
- glFrontFace(GL_CW);
- glEnable(GL_CULL_FACE);
-#endif
-}
-
-static void Reshape(int width, int height)
-{
-
- windW = (GLint)width;
- windH = (GLint)height;
-}
-
-static void Render(GLenum mode)
-{
- GLint i;
-
- for (i = 0; i < objectCount; i++) {
- if (mode == GL_SELECT) {
- glLoadName(i);
- }
- glColor3fv(objects[i].color);
- glBegin(GL_POLYGON);
- glVertex2fv(objects[i].v1);
- glVertex2fv(objects[i].v2);
- glVertex2fv(objects[i].v3);
- glEnd();
- }
-}
-
-static GLint DoSelect(GLint x, GLint y)
-{
- GLint hits;
-
- glSelectBuffer(MAXSELECT, selectBuf);
- (void)glRenderMode(GL_SELECT);
- glInitNames();
- glPushName(~0);
-
- glPushMatrix();
-
- glViewport(0, 0, windW, windH);
- glGetIntegerv(GL_VIEWPORT, vp);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPickMatrix(x, windH-y, 4, 4, vp);
- gluOrtho2D(-175, 175, -175, 175);
- glMatrixMode(GL_MODELVIEW);
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glScalef(zoom, zoom, zoom);
- glRotatef(zRotation, 0, 0, 1);
-
- Render(GL_SELECT);
-
- glPopMatrix();
-
- hits = glRenderMode(GL_RENDER);
- if (hits <= 0) {
- return -1;
- }
-
- return selectBuf[(hits-1)*4+3];
-}
-
-static void RecolorTri(GLint h)
-{
-
- objects[h].color[0] = ((rand() % 100) + 50) / 150.0;
- objects[h].color[1] = ((rand() % 100) + 50) / 150.0;
- objects[h].color[2] = ((rand() % 100) + 50) / 150.0;
-}
-
-static void DeleteTri(GLint h)
-{
-
- objects[h] = objects[objectCount-1];
- objectCount--;
-}
-
-static void GrowTri(GLint h)
-{
- float v[2];
- float *oldV = NULL;
- GLint i;
-
- v[0] = objects[h].v1[0] + objects[h].v2[0] + objects[h].v3[0];
- v[1] = objects[h].v1[1] + objects[h].v2[1] + objects[h].v3[1];
- v[0] /= 3;
- v[1] /= 3;
-
- for (i = 0; i < 3; i++) {
- switch (i) {
- case 0:
- oldV = objects[h].v1;
- break;
- case 1:
- oldV = objects[h].v2;
- break;
- case 2:
- oldV = objects[h].v3;
- break;
- }
- oldV[0] = 1.5 * (oldV[0] - v[0]) + v[0];
- oldV[1] = 1.5 * (oldV[1] - v[1]) + v[1];
- }
-}
-
-static void Mouse(int button, int state, int mouseX, int mouseY)
-{
- GLint hit;
-
- if (state != GLUT_DOWN)
- return;
-
- hit = DoSelect((GLint)mouseX, (GLint)mouseY);
- if (hit != -1) {
- if (button == GLUT_LEFT_BUTTON) {
- RecolorTri(hit);
- }
- if (button == GLUT_MIDDLE_BUTTON) {
- GrowTri(hit);
- }
- if (button == GLUT_RIGHT_BUTTON) {
- DeleteTri(hit);
- }
- }
-
- glutPostRedisplay();
-}
-
-static void Draw(void)
-{
-
- glPushMatrix();
-
- glViewport(0, 0, windW, windH);
- glGetIntegerv(GL_VIEWPORT, vp);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluOrtho2D(-175, 175, -175, 175);
- glMatrixMode(GL_MODELVIEW);
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glScalef(zoom, zoom, zoom);
- glRotatef(zRotation, 0, 0, 1);
-
- Render(GL_RENDER);
-
- glPopMatrix();
-
- glFlush();
-}
-
-static void DrawZoom(GLint x, GLint y)
-{
-
- glPushMatrix();
-
- glViewport(0, 0, windW, windH);
- glGetIntegerv(GL_VIEWPORT, vp);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPickMatrix(x, windH-y, 4, 4, vp);
- gluOrtho2D(-175, 175, -175, 175);
- glMatrixMode(GL_MODELVIEW);
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glScalef(zoom, zoom, zoom);
- glRotatef(zRotation, 0, 0, 1);
-
- Render(GL_RENDER);
-
- glPopMatrix();
-}
-
-static void DumpFeedbackVert(GLint *i, GLint n)
-{
- GLint index;
-
- index = *i;
- if (index+7 > n) {
- *i = n;
- printf(" ???\n");
- return;
- }
- printf(" (%g %g %g), color = (%4.2f %4.2f %4.2f)\n",
- feedBuf[index],
- feedBuf[index+1],
- feedBuf[index+2],
- feedBuf[index+3],
- feedBuf[index+4],
- feedBuf[index+5]);
- index += 7;
- *i = index;
-}
-
-static void DrawFeedback(GLint n)
-{
- GLint i;
- GLint verts;
-
- printf("Feedback results (%d floats):\n", n);
- for (i = 0; i < n; i++) {
- switch ((GLint)feedBuf[i]) {
- case GL_POLYGON_TOKEN:
- printf("Polygon");
- i++;
- if (i < n) {
- verts = (GLint)feedBuf[i];
- i++;
- printf(": %d vertices", verts);
- } else {
- verts = 0;
- }
- printf("\n");
- while (verts) {
- DumpFeedbackVert(&i, n);
- verts--;
- }
- i--;
- break;
- case GL_LINE_TOKEN:
- printf("Line:\n");
- i++;
- DumpFeedbackVert(&i, n);
- DumpFeedbackVert(&i, n);
- i--;
- break;
- case GL_LINE_RESET_TOKEN:
- printf("Line Reset:\n");
- i++;
- DumpFeedbackVert(&i, n);
- DumpFeedbackVert(&i, n);
- i--;
- break;
- default:
- printf("%9.2f\n", feedBuf[i]);
- break;
- }
- }
- if (i == MAXFEED) {
- printf("...\n");
- }
- printf("\n");
-}
-
-static void DoFeedback(void)
-{
- GLint x;
-
- glFeedbackBuffer(MAXFEED, GL_3D_COLOR, feedBuf);
- (void)glRenderMode(GL_FEEDBACK);
-
- glPushMatrix();
-
- glViewport(0, 0, windW, windH);
- glGetIntegerv(GL_VIEWPORT, vp);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluOrtho2D(-175, 175, -175, 175);
- glMatrixMode(GL_MODELVIEW);
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glScalef(zoom, zoom, zoom);
- glRotatef(zRotation, 0, 0, 1);
-
- Render(GL_FEEDBACK);
-
- glPopMatrix();
-
- x = glRenderMode(GL_RENDER);
- if (x == -1) {
- x = MAXFEED;
- }
-
- DrawFeedback((GLint)x);
-}
-
-static void Key2(int key, int x, int y)
-{
- switch (key) {
- case GLUT_KEY_LEFT:
- zRotation += 0.5;
- break;
- case GLUT_KEY_RIGHT:
- zRotation -= 0.5;
- break;
- default:
- return;
- }
-
- glutPostRedisplay();
-}
-
-static void Key(unsigned char key, int x, int y)
-{
- switch (key) {
- case 27:
- exit(1);
- case 'Z':
- zoom /= 0.75;
- break;
- case 'z':
- zoom *= 0.75;
- break;
- case 'f':
- DoFeedback();
- break;
- case 'd':
- DrawZoom(x, y);
- break;
- case 'l':
- linePoly = !linePoly;
- if (linePoly) {
- glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
- } else {
- glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
- }
- break;
- default:
- return;
- }
-
- glutPostRedisplay();
-}
-
-int main(int argc, char **argv)
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- windW = 300;
- windH = 300;
- glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH);
-
- type = GLUT_RGB | GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow("Select Test") == GL_FALSE) {
- exit(1);
- }
-
- Init();
-
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(Key2);
- glutMouseFunc(Mouse);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff