--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <GL/glut.h>
+#include <cgmath/cgmath.h>
+
+enum {
+ KEY_F1 = GLUT_KEY_F1 | 0x100,
+ KEY_F2 = GLUT_KEY_F2 | 0x100,
+ KEY_F3 = GLUT_KEY_F3 | 0x100,
+ KEY_F4 = GLUT_KEY_F4 | 0x100,
+ KEY_F5 = GLUT_KEY_F5 | 0x100,
+ KEY_F6 = GLUT_KEY_F6 | 0x100,
+ KEY_F7 = GLUT_KEY_F7 | 0x100,
+ KEY_F8 = GLUT_KEY_F8 | 0x100,
+ KEY_F9 = GLUT_KEY_F9 | 0x100,
+ KEY_F10 = GLUT_KEY_F10 | 0x100,
+ KEY_F11 = GLUT_KEY_F11 | 0x100,
+ KEY_F12 = GLUT_KEY_F12 | 0x100,
+ KEY_LEFT = GLUT_KEY_LEFT | 0x100,
+ KEY_UP = GLUT_KEY_UP | 0x100,
+ KEY_RIGHT = GLUT_KEY_RIGHT | 0x100,
+ KEY_DOWN = GLUT_KEY_DOWN | 0x100,
+ KEY_PGUP = GLUT_KEY_PAGE_UP | 0x100,
+ KEY_PGDN = GLUT_KEY_PAGE_DOWN | 0x100,
+ KEY_HOME = GLUT_KEY_HOME | 0x100,
+ KEY_END = GLUT_KEY_END | 0x100,
+ KEY_INS = GLUT_KEY_INSERT | 0x100
+};
+
+enum { INP_FWD, INP_BACK, INP_RIGHT, INP_LEFT, INP_FIRE, NUM_INPUTS };
+
+static int init(void);
+static void cleanup(void);
+static void display(void);
+static void idle(void);
+static void reshape(int x, int y);
+static void keydown(unsigned char key, int x, int y);
+static void keyup(unsigned char key, int x, int y);
+static void skeydown(int key, int x, int y);
+static void skeyup(int key, int x, int y);
+static void mouse(int bn, int st, int x, int y);
+static void motion(int x, int y);
+
+
+static long start_time;
+
+static float cam_theta, cam_phi;
+static cgm_vec3 cam_pos;
+static float pxform[16];
+
+static int mouse_x, mouse_y;
+static int bnstate[8];
+
+static int inpstate[NUM_INPUTS];
+
+static int keymap[NUM_INPUTS][2] = {
+ {'w', KEY_UP},
+ {'s', KEY_DOWN},
+ {'d', KEY_RIGHT},
+ {'a', KEY_LEFT},
+ {' ', 0}
+};
+
+int main(int argc, char **argv)
+{
+ glutInit(&argc, argv);
+ glutInitWindowSize(1280, 800);
+ glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
+ glutCreateWindow("cyberay");
+
+ glutDisplayFunc(display);
+ glutIdleFunc(idle);
+ glutReshapeFunc(reshape);
+ glutKeyboardFunc(keydown);
+ glutKeyboardUpFunc(keyup);
+ glutSpecialFunc(skeydown);
+ glutSpecialUpFunc(skeyup);
+ glutMouseFunc(mouse);
+ glutMotionFunc(motion);
+ glutPassiveMotionFunc(motion);
+
+ if(init() == -1) {
+ return 1;
+ }
+ atexit(cleanup);
+
+ glutMainLoop();
+ return 0;
+}
+
+static int init(void)
+{
+ glEnable(GL_CULL_FACE);
+
+ glEnable(GL_DEPTH_TEST);
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+
+ start_time = glutGet(GLUT_ELAPSED_TIME);
+ return 0;
+}
+
+static void cleanup(void)
+{
+}
+
+#define WALK_SPEED 1.0f
+static void update(void)
+{
+ static unsigned int prev_upd;
+ unsigned int msec;
+ float dt, vfwd, vright;
+
+ msec = glutGet(GLUT_ELAPSED_TIME) - start_time;
+ dt = (float)(msec - prev_upd) / 1000.0f;
+ prev_upd = msec;
+
+ vfwd = vright = 0;
+
+ if(inpstate[INP_FWD]) {
+ vfwd -= WALK_SPEED * dt;
+ }
+ if(inpstate[INP_BACK]) {
+ vfwd += WALK_SPEED * dt;
+ }
+ if(inpstate[INP_RIGHT]) {
+ vright -= WALK_SPEED * dt;
+ }
+ if(inpstate[INP_LEFT]) {
+ vright += WALK_SPEED * dt;
+ }
+
+ cam_pos.x += cos(cam_theta) * vright + sin(cam_theta) * vfwd;
+ cam_pos.z += sin(cam_theta) * vright - cos(cam_theta) * vfwd;
+
+ cgm_midentity(pxform);
+ cgm_mtranslate(pxform, cam_pos.x, cam_pos.y, cam_pos.z);
+ cgm_mrotate_y(pxform, cam_theta);
+ cgm_mrotate_x(pxform, cam_phi);
+}
+
+static void display(void)
+{
+ update();
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glMatrixMode(GL_MODELVIEW);
+ glLoadMatrixf(pxform);
+
+ glFrontFace(GL_CW);
+ glutSolidTeapot(1.0);
+ glFrontFace(GL_CCW);
+
+ glutSwapBuffers();
+ assert(glGetError() == GL_NO_ERROR);
+}
+
+static void idle(void)
+{
+ glutPostRedisplay();
+}
+
+static void reshape(int x, int y)
+{
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
+}
+
+static void keyb(int key, int press)
+{
+ int i;
+
+ for(i=0; i<NUM_INPUTS; i++) {
+ if(keymap[i][0] == key || keymap[i][1] == key) {
+ inpstate[i] = press;
+ }
+ }
+}
+
+static void keydown(unsigned char key, int x, int y)
+{
+ if(key == 27) exit(0);
+ keyb(key, 1);
+}
+
+static void keyup(unsigned char key, int x, int y)
+{
+ keyb(key, 0);
+}
+
+static void skeydown(int key, int x, int y)
+{
+ keyb(key | 0x100, 1);
+}
+
+static void skeyup(int key, int x, int y)
+{
+ keyb(key | 0x100, 0);
+}
+
+static void mouse(int bn, int st, int x, int y)
+{
+ mouse_x = x;
+ mouse_y = y;
+ bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN ? 1 : 0;
+}
+
+static void motion(int x, int y)
+{
+ int dx = x - mouse_x;
+ int dy = y - mouse_y;
+ mouse_x = x;
+ mouse_y = y;
+
+ if(!(dx | dy)) return;
+
+ if(bnstate[0]) {
+ cam_theta += dx * 0.01;
+ cam_phi += dy * 0.01;
+
+ if(cam_phi < -M_PI) cam_phi = -M_PI;
+ if(cam_phi > M_PI) cam_phi = M_PI;
+ }
+}
projects / cyberay / commitdiff