mirror of https://gitlab.freedesktop.org/mesa/mesa
457 lines
8.8 KiB
C
457 lines
8.8 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|
|
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;
|
|
}
|