90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
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/* A simple program to build a circle with display lists */
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#include <windows.h>
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#include <stdio.h>
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#include <math.h>
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#include <GL/gl.h>
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#include "glaux.h"
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#define MY_CIRCLE_LIST 1
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#define PI 3.1415926535897
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void
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buildCircle()
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{
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GLint i;
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GLfloat cosine, sine;
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glNewList(MY_CIRCLE_LIST, GL_COMPILE);
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glBegin(GL_POLYGON);
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glColor3f(1.0F, 0.0F, 0.0F);
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for (i=0; i<100; i++) {
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cosine = cos(i*2*PI/100.0);
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sine = sin(i*2*PI/100.0);
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glVertex2f(cosine, sine);
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}
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glEnd();
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glEndList();
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}
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void myReshape(GLsizei w, GLsizei h)
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{
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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void display(void)
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{
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printf("display called\n");
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glClear(GL_COLOR_BUFFER_BIT);
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glCallList(MY_CIRCLE_LIST);
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glFlush();
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}
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void myinit(void)
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{
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glClearColor(0.0F, 0.0F, 0.4F, 1.0F);
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glShadeModel(GL_FLAT);
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glDisable(GL_DEPTH_TEST);
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buildCircle();
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}
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void apressed(key, mask)
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{
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printf("key is %d, mask is 0x%x\n", key, mask);
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}
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void LeftPressed(AUX_EVENTREC *event)
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{
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printf("Left pressed (%d, %d)\n", event->data[AUX_MOUSEX],
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event->data[AUX_MOUSEY]);
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}
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void LeftReleased(AUX_EVENTREC *event)
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{
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printf("Left released (%d, %d)\n", event->data[AUX_MOUSEX],
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event->data[AUX_MOUSEY]);
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}
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int main(int argc, char *argv[])
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{
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auxInitDisplayMode(AUX_SINGLE | AUX_RGBA);
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auxInitPosition(100, 150, 300, 300);
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auxInitWindow("Tri");
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myinit();
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auxKeyFunc(AUX_a, apressed);
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auxMouseFunc(AUX_LEFTBUTTON, AUX_MOUSEDOWN, LeftPressed);
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auxMouseFunc(AUX_LEFTBUTTON, AUX_MOUSEUP, LeftReleased);
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auxReshapeFunc (myReshape);
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auxMainLoop(display);
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return 0;
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}
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