cloth2

annotate src/main.cc @ 1:dc15b741486c

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exploding cloth
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 11 Jan 2016 20:24:13 +0200
parents ef0c22554406
children b4b8f736332b
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <assert.h>
nuclear@0 4 #include <GL/glew.h>
nuclear@0 5 #ifdef __APPLE__
nuclear@0 6 #include <GLUT/glut.h>
nuclear@0 7 #else
nuclear@0 8 #include <GL/glut.h>
nuclear@0 9 #endif
nuclear@0 10 #include "object.h"
nuclear@0 11 #include "cloth.h"
nuclear@0 12
nuclear@0 13 bool init();
nuclear@0 14 void cleanup();
nuclear@0 15 void display();
nuclear@0 16 void idle();
nuclear@0 17 void reshape(int x, int y);
nuclear@0 18 void keyboard(unsigned char key, int x, int y);
nuclear@0 19 void mouse(int bn, int st, int x, int y);
nuclear@0 20 void motion(int x, int y);
nuclear@0 21
nuclear@1 22 float cam_theta, cam_phi = 25, cam_dist = 10;
nuclear@0 23
nuclear@0 24 Cloth cloth;
nuclear@0 25
nuclear@0 26 int main(int argc, char **argv)
nuclear@0 27 {
nuclear@0 28 glutInit(&argc, argv);
nuclear@0 29 glutInitWindowSize(800, 600);
nuclear@0 30 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@0 31 glutCreateWindow("foo");
nuclear@0 32
nuclear@0 33 glutDisplayFunc(display);
nuclear@0 34 glutIdleFunc(idle);
nuclear@0 35 glutReshapeFunc(reshape);
nuclear@0 36 glutKeyboardFunc(keyboard);
nuclear@0 37 glutMouseFunc(mouse);
nuclear@0 38 glutMotionFunc(motion);
nuclear@0 39
nuclear@0 40 if(!init()) {
nuclear@0 41 return 1;
nuclear@0 42 }
nuclear@0 43 atexit(cleanup);
nuclear@0 44
nuclear@0 45 glutMainLoop();
nuclear@0 46 }
nuclear@0 47
nuclear@0 48
nuclear@0 49 bool init()
nuclear@0 50 {
nuclear@0 51 glewInit();
nuclear@0 52
nuclear@0 53 glEnable(GL_DEPTH_TEST);
nuclear@0 54 glEnable(GL_CULL_FACE);
nuclear@0 55 //glEnable(GL_LIGHTING);
nuclear@0 56 glEnable(GL_LIGHT0);
nuclear@0 57
nuclear@1 58 cloth.create_rect(4, 4, 10, 10);
nuclear@0 59
nuclear@0 60 Matrix4x4 xform = Matrix4x4(1, 0, 0, 0,
nuclear@0 61 0, 1, 0, 0,
nuclear@0 62 0, 0, 1, 0,
nuclear@1 63 0, 1, 1, 1);
nuclear@0 64 cloth.transform(xform);
nuclear@1 65 cloth.set_mass(0.1);
nuclear@1 66 cloth.set_spring_constant(0.1);
nuclear@1 67 cloth.set_gravity(Vector3(0, -0.1, 0));
nuclear@1 68 cloth.set_damping(0.1);
nuclear@0 69
nuclear@0 70
nuclear@0 71 return true;
nuclear@0 72 }
nuclear@0 73
nuclear@0 74 void cleanup()
nuclear@0 75 {
nuclear@0 76 }
nuclear@0 77
nuclear@0 78 void display()
nuclear@0 79 {
nuclear@1 80 static unsigned int prev_upd;
nuclear@1 81 unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@1 82
nuclear@1 83 if(!prev_upd) prev_upd = msec;
nuclear@1 84 float dt = (msec - prev_upd) / 1000.0f;
nuclear@1 85
nuclear@1 86 cloth.step(dt);
nuclear@1 87
nuclear@0 88 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 89
nuclear@0 90 glMatrixMode(GL_MODELVIEW);
nuclear@0 91 glLoadIdentity();
nuclear@0 92 glTranslatef(0, 0, -cam_dist);
nuclear@0 93 glRotatef(cam_phi, 1, 0, 0);
nuclear@0 94 glRotatef(cam_theta, 0, 1, 0);
nuclear@0 95
nuclear@0 96 cloth.draw();
nuclear@0 97
nuclear@0 98 glutSwapBuffers();
nuclear@0 99 assert(glGetError() == GL_NO_ERROR);
nuclear@0 100 }
nuclear@0 101
nuclear@0 102 void idle()
nuclear@0 103 {
nuclear@0 104 glutPostRedisplay();
nuclear@0 105 }
nuclear@0 106
nuclear@0 107 void reshape(int x, int y)
nuclear@0 108 {
nuclear@0 109 glViewport(0, 0, x, y);
nuclear@0 110
nuclear@0 111 glMatrixMode(GL_PROJECTION);
nuclear@0 112 glLoadIdentity();
nuclear@0 113 gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
nuclear@0 114 }
nuclear@0 115
nuclear@0 116 void keyboard(unsigned char key, int x, int y)
nuclear@0 117 {
nuclear@0 118 switch(key) {
nuclear@0 119 case 27:
nuclear@0 120 exit(0);
nuclear@0 121 }
nuclear@0 122 }
nuclear@0 123
nuclear@0 124 static bool bnstate[16];
nuclear@0 125 static int prev_x, prev_y;
nuclear@0 126
nuclear@0 127 void mouse(int bn, int st, int x, int y)
nuclear@0 128 {
nuclear@0 129 prev_x = x;
nuclear@0 130 prev_y = y;
nuclear@0 131 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@0 132 }
nuclear@0 133
nuclear@0 134 void motion(int x, int y)
nuclear@0 135 {
nuclear@0 136 int dx = x - prev_x;
nuclear@0 137 int dy = y - prev_y;
nuclear@0 138 prev_x = x;
nuclear@0 139 prev_y = y;
nuclear@0 140
nuclear@0 141 if(!dx && !dy) return;
nuclear@0 142
nuclear@0 143 if(bnstate[0]) {
nuclear@0 144 cam_theta += dx * 0.5;
nuclear@0 145 cam_phi += dy * 0.5;
nuclear@0 146
nuclear@0 147 if(cam_phi < -90) cam_phi = -90;
nuclear@0 148 if(cam_phi > 90) cam_phi = 90;
nuclear@0 149 }
nuclear@0 150 if(bnstate[2]) {
nuclear@0 151 cam_dist += dy * 0.1;
nuclear@0 152 if(cam_dist < 0.0) cam_dist = 0.0;
nuclear@0 153 }
nuclear@0 154 }