1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/main.cc	Tue Feb 25 19:53:34 2014 +0200
     1.3 @@ -0,0 +1,174 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <assert.h>
     1.7 +#include <vector>
     1.8 +#include "opengl.h"
     1.9 +#include "camera.h"
    1.10 +
    1.11 +static bool init();
    1.12 +static void cleanup();
    1.13 +static void handle_input(float dt);
    1.14 +static void disp();
    1.15 +static void idle();
    1.16 +static void reshape(int x, int y);
    1.17 +static void keypress(unsigned char key, int x, int y);
    1.18 +static void keyrelease(unsigned char key, int x, int y);
    1.19 +static void mouse(int bn, int st, int x, int y);
    1.20 +static void motion(int x, int y);
    1.21 +
    1.22 +static goatgfx::VRFpsCamera cam;
    1.23 +static std::vector<bool> keystate(256);
    1.24 +
    1.25 +int main(int argc, char **argv)
    1.26 +{
    1.27 +	glutInitWindowSize(800, 600);
    1.28 +	glutInit(&argc, argv);
    1.29 +	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    1.30 +	glutCreateWindow("symmetry");
    1.31 +
    1.32 +	glutDisplayFunc(disp);
    1.33 +	glutIdleFunc(idle);
    1.34 +	glutReshapeFunc(reshape);
    1.35 +	glutKeyboardFunc(keypress);
    1.36 +	glutKeyboardUpFunc(keyrelease);
    1.37 +	glutMouseFunc(mouse);
    1.38 +	glutMotionFunc(motion);
    1.39 +
    1.40 +	if(!init()) {
    1.41 +		return 1;
    1.42 +	}
    1.43 +	atexit(cleanup);
    1.44 +
    1.45 +	glutMainLoop();
    1.46 +	return 0;
    1.47 +}
    1.48 +
    1.49 +
    1.50 +static bool init()
    1.51 +{
    1.52 +	glewInit();
    1.53 +
    1.54 +	glEnable(GL_DEPTH_TEST);
    1.55 +	glEnable(GL_CULL_FACE);
    1.56 +
    1.57 +	glEnable(GL_LIGHTING);
    1.58 +	glEnable(GL_LIGHT0);
    1.59 +
    1.60 +	cam.input_move(0, 1.65, 0);
    1.61 +
    1.62 +	return true;
    1.63 +}
    1.64 +
    1.65 +static void cleanup()
    1.66 +{
    1.67 +}
    1.68 +
    1.69 +static void disp()
    1.70 +{
    1.71 +	unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
    1.72 +	static unsigned int prev_msec;
    1.73 +	float dt = (float)(msec - prev_msec) / 1000.0f;
    1.74 +
    1.75 +	handle_input(dt);
    1.76 +
    1.77 +	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    1.78 +
    1.79 +	glMatrixMode(GL_MODELVIEW);
    1.80 +	glLoadIdentity();
    1.81 +	cam.use_inverse();
    1.82 +
    1.83 +	glBegin(GL_QUADS);
    1.84 +	glNormal3f(0, 1, 0);
    1.85 +	glVertex3f(-5, 0, 5);
    1.86 +	glVertex3f(5, 0, 5);
    1.87 +	glVertex3f(5, 0, -5);
    1.88 +	glVertex3f(-5, 0, -5);
    1.89 +	glEnd();
    1.90 +
    1.91 +	glFrontFace(GL_CW);
    1.92 +	glutSolidTeapot(1.0);
    1.93 +	glFrontFace(GL_CCW);
    1.94 +
    1.95 +	glutSwapBuffers();
    1.96 +	assert(glGetError() == GL_NO_ERROR);
    1.97 +}
    1.98 +
    1.99 +
   1.100 +static void handle_input(float dt)
   1.101 +{
   1.102 +	Vector3 inpv;
   1.103 +	float offs = dt * 2.0;
   1.104 +
   1.105 +	if(keystate['w'] || keystate['W']) {
   1.106 +		inpv.z -= offs;
   1.107 +	}
   1.108 +	if(keystate['s'] || keystate['S']) {
   1.109 +		inpv.z += offs;
   1.110 +	}
   1.111 +	if(keystate['d'] || keystate['D']) {
   1.112 +		inpv.x += offs;
   1.113 +	}
   1.114 +	if(keystate['a'] || keystate['A']) {
   1.115 +		inpv.x -= offs;
   1.116 +	}
   1.117 +
   1.118 +	cam.input_move(inpv.x, inpv.y, inpv.z);
   1.119 +}
   1.120 +
   1.121 +static void idle()
   1.122 +{
   1.123 +	glutPostRedisplay();
   1.124 +}
   1.125 +
   1.126 +static void reshape(int x, int y)
   1.127 +{
   1.128 +	glViewport(0, 0, x, y);
   1.129 +
   1.130 +	glMatrixMode(GL_PROJECTION);
   1.131 +	glLoadIdentity();
   1.132 +	gluPerspective(45.0, (float)x / (float)y, 0.5, 500.0);
   1.133 +}
   1.134 +
   1.135 +static void keypress(unsigned char key, int x, int y)
   1.136 +{
   1.137 +	keystate[key] = true;
   1.138 +
   1.139 +	switch(key) {
   1.140 +	case 27:
   1.141 +		exit(0);
   1.142 +	}
   1.143 +}
   1.144 +
   1.145 +static void keyrelease(unsigned char key, int x, int y)
   1.146 +{
   1.147 +	keystate[key] = false;
   1.148 +}
   1.149 +
   1.150 +static int prev_x, prev_y;
   1.151 +static bool bnstate[32];
   1.152 +
   1.153 +static void mouse(int bn, int st, int x, int y)
   1.154 +{
   1.155 +	prev_x = x;
   1.156 +	prev_y = y;
   1.157 +	bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
   1.158 +}
   1.159 +
   1.160 +static void motion(int x, int y)
   1.161 +{
   1.162 +	int dx = x - prev_x;
   1.163 +	int dy = y - prev_y;
   1.164 +	prev_x = x;
   1.165 +	prev_y = y;
   1.166 +
   1.167 +	if(!dx && !dy) {
   1.168 +		return;
   1.169 +	}
   1.170 +
   1.171 +	if(bnstate[0]) {
   1.172 +		float dtheta_deg = dy * 0.5;
   1.173 +		float dphi_deg = dx * 0.5;
   1.174 +
   1.175 +		cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
   1.176 +	}
   1.177 +}