fractorb

annotate src/main.c @ 0:6e849d7377ff

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initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 18 Nov 2017 20:04:16 +0200
parents
children 436f82447c44
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <GL/glew.h>
nuclear@0 4 #include <GL/glut.h>
nuclear@0 5 #include "sdr.h"
nuclear@0 6
nuclear@0 7 int init(void);
nuclear@0 8 void cleanup(void);
nuclear@0 9 void disp(void);
nuclear@0 10 void reshape(int x, int y);
nuclear@0 11 void keyb(unsigned char key, int x, int y);
nuclear@0 12 void mouse(int bn, int st, int x, int y);
nuclear@0 13 void motion(int x, int y);
nuclear@0 14
nuclear@0 15 static float aspect;
nuclear@0 16 static int mouse_x, mouse_y;
nuclear@0 17 static unsigned int prog_mbrot;
nuclear@0 18
nuclear@0 19 int main(int argc, char **argv)
nuclear@0 20 {
nuclear@0 21 glutInit(&argc, argv);
nuclear@0 22 glutInitWindowSize(1280, 800);
nuclear@0 23 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
nuclear@0 24 glutCreateWindow("fractorb");
nuclear@0 25
nuclear@0 26 glutDisplayFunc(disp);
nuclear@0 27 glutReshapeFunc(reshape);
nuclear@0 28 glutKeyboardFunc(keyb);
nuclear@0 29 glutMouseFunc(mouse);
nuclear@0 30 glutMotionFunc(motion);
nuclear@0 31
nuclear@0 32 if(init() == -1) {
nuclear@0 33 return 1;
nuclear@0 34 }
nuclear@0 35 atexit(cleanup);
nuclear@0 36
nuclear@0 37 glutMainLoop();
nuclear@0 38 return 0;
nuclear@0 39 }
nuclear@0 40
nuclear@0 41
nuclear@0 42 int init(void)
nuclear@0 43 {
nuclear@0 44 glewInit();
nuclear@0 45
nuclear@0 46 if(!(prog_mbrot = create_program_load("vertex.glsl", "mbrot.glsl"))) {
nuclear@0 47 return -1;
nuclear@0 48 }
nuclear@0 49 set_uniform_float(prog_mbrot, "view_scale", 1.1);
nuclear@0 50 set_uniform_float2(prog_mbrot, "view_center", 0.7, 0);
nuclear@0 51 return 0;
nuclear@0 52 }
nuclear@0 53
nuclear@0 54 void cleanup(void)
nuclear@0 55 {
nuclear@0 56 free_program(prog_mbrot);
nuclear@0 57 }
nuclear@0 58
nuclear@0 59 void disp(void)
nuclear@0 60 {
nuclear@0 61 glUseProgram(prog_mbrot);
nuclear@0 62
nuclear@0 63 glBegin(GL_QUADS);
nuclear@0 64 glTexCoord2f(-aspect, 1); glVertex2f(-1, -1);
nuclear@0 65 glTexCoord2f(aspect, 1); glVertex2f(1, -1);
nuclear@0 66 glTexCoord2f(aspect, -1); glVertex2f(1, 1);
nuclear@0 67 glTexCoord2f(-aspect, -1); glVertex2f(-1, 1);
nuclear@0 68 glEnd();
nuclear@0 69
nuclear@0 70 glutSwapBuffers();
nuclear@0 71 }
nuclear@0 72
nuclear@0 73 void reshape(int x, int y)
nuclear@0 74 {
nuclear@0 75 glViewport(0, 0, x, y);
nuclear@0 76
nuclear@0 77 aspect = (float)x / (float)y;
nuclear@0 78 }
nuclear@0 79
nuclear@0 80 void keyb(unsigned char key, int x, int y)
nuclear@0 81 {
nuclear@0 82 if(key == 27) {
nuclear@0 83 exit(0);
nuclear@0 84 }
nuclear@0 85 }
nuclear@0 86
nuclear@0 87 void mouse(int bn, int st, int x, int y)
nuclear@0 88 {
nuclear@0 89 }
nuclear@0 90
nuclear@0 91 void motion(int x, int y)
nuclear@0 92 {
nuclear@0 93 mouse_x = x;
nuclear@0 94 mouse_y = y;
nuclear@0 95 }