1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/goatview/src/main.c	Fri Sep 27 06:58:37 2013 +0300
     1.3 @@ -0,0 +1,191 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <assert.h>
     1.7 +#ifndef __APPLE__
     1.8 +#include <GL/glut.h>
     1.9 +#else
    1.10 +#include <GLUT/glut.h>
    1.11 +#endif
    1.12 +#include "goat3d.h"
    1.13 +
    1.14 +static void cleanup(void);
    1.15 +static void disp(void);
    1.16 +static void draw_scene(struct goat3d *g);
    1.17 +static void draw_mesh(struct goat3d_mesh *mesh);
    1.18 +static void reshape(int x, int y);
    1.19 +static void keyb(unsigned char key, int x, int y);
    1.20 +static void mouse(int bn, int st, int x, int y);
    1.21 +static void motion(int x, int y);
    1.22 +
    1.23 +static struct goat3d *goat;
    1.24 +static float cam_theta, cam_phi, cam_dist = 10;
    1.25 +
    1.26 +int main(int argc, char **argv)
    1.27 +{
    1.28 +	glutInitWindowSize(800, 600);
    1.29 +	glutInit(&argc, argv);
    1.30 +
    1.31 +	if(!argv[1]) {
    1.32 +		fprintf(stderr, "you must specify a goat3d scene file to open\n");
    1.33 +		return 1;
    1.34 +	}
    1.35 +
    1.36 +	if(!(goat = goat3d_create())) {
    1.37 +		fprintf(stderr, "failed to create goat3d\n");
    1.38 +		return 1;
    1.39 +	}
    1.40 +	if(goat3d_load(goat, argv[1]) == -1) {
    1.41 +		fprintf(stderr, "failed to load goat3d scene: %s\n", argv[1]);
    1.42 +		goat3d_free(goat);
    1.43 +		return 1;
    1.44 +	}
    1.45 +
    1.46 +	glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
    1.47 +	glutCreateWindow(argv[1]);
    1.48 +
    1.49 +	glutDisplayFunc(disp);
    1.50 +	glutReshapeFunc(reshape);
    1.51 +	glutKeyboardFunc(keyb);
    1.52 +	glutMouseFunc(mouse);
    1.53 +	glutMotionFunc(motion);
    1.54 +
    1.55 +	glEnable(GL_DEPTH_TEST);
    1.56 +	glEnable(GL_CULL_FACE);
    1.57 +	glEnable(GL_LIGHTING);
    1.58 +	glEnable(GL_LIGHT0);
    1.59 +
    1.60 +	glClearColor(0.1, 0.1, 0.1, 1.0);
    1.61 +
    1.62 +	atexit(cleanup);
    1.63 +
    1.64 +	glutMainLoop();
    1.65 +	return 0;
    1.66 +}
    1.67 +
    1.68 +static void cleanup(void)
    1.69 +{
    1.70 +	goat3d_free(goat);
    1.71 +}
    1.72 +
    1.73 +static void disp(void)
    1.74 +{
    1.75 +	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    1.76 +
    1.77 +	glMatrixMode(GL_MODELVIEW);
    1.78 +	glLoadIdentity();
    1.79 +	glTranslatef(0, 0, -cam_dist);
    1.80 +	glRotatef(cam_phi, 1, 0, 0);
    1.81 +	glRotatef(cam_theta, 0, 1, 0);
    1.82 +
    1.83 +	draw_scene(goat);
    1.84 +
    1.85 +	glutSwapBuffers();
    1.86 +	assert(glGetError() == GL_NO_ERROR);
    1.87 +}
    1.88 +
    1.89 +static void draw_scene(struct goat3d *g)
    1.90 +{
    1.91 +	int i, num_meshes;
    1.92 +
    1.93 +	num_meshes = goat3d_get_mesh_count(g);
    1.94 +	for(i=0; i<num_meshes; i++) {
    1.95 +		struct goat3d_mesh *mesh = goat3d_get_mesh(g, i);
    1.96 +		draw_mesh(mesh);
    1.97 +	}
    1.98 +}
    1.99 +
   1.100 +static void draw_mesh(struct goat3d_mesh *mesh)
   1.101 +{
   1.102 +	int vnum, fnum;
   1.103 +	struct goat3d_material *mtl;
   1.104 +	float *verts, *normals, *texcoords;
   1.105 +	int *vidx;
   1.106 +
   1.107 +	if((mtl = goat3d_get_mesh_mtl(mesh))) {
   1.108 +		/* TODO */
   1.109 +	}
   1.110 +
   1.111 +	vnum = goat3d_get_mesh_attrib_count(mesh, GOAT3D_MESH_ATTR_VERTEX);
   1.112 +	fnum = goat3d_get_mesh_face_count(mesh);
   1.113 +
   1.114 +	if(!vnum || !fnum) {
   1.115 +		return;
   1.116 +	}
   1.117 +
   1.118 +	verts = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_VERTEX);
   1.119 +	normals = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_NORMAL);
   1.120 +	texcoords = goat3d_get_mesh_attribs(mesh, GOAT3D_MESH_ATTR_TEXCOORD);
   1.121 +	vidx = goat3d_get_mesh_faces(mesh);
   1.122 +
   1.123 +	glEnableClientState(GL_VERTEX_ARRAY);
   1.124 +	glVertexPointer(3, GL_FLOAT, 0, verts);
   1.125 +
   1.126 +	if(normals) {
   1.127 +		glEnableClientState(GL_NORMAL_ARRAY);
   1.128 +		glNormalPointer(GL_FLOAT, 0, normals);
   1.129 +	}
   1.130 +	if(texcoords) {
   1.131 +		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
   1.132 +		glTexCoordPointer(2, GL_FLOAT, 0, texcoords);
   1.133 +	}
   1.134 +
   1.135 +	glDrawElements(GL_TRIANGLES, fnum * 3, GL_UNSIGNED_INT, vidx);
   1.136 +
   1.137 +	glDisableClientState(GL_VERTEX_ARRAY);
   1.138 +	if(normals) {
   1.139 +		glDisableClientState(GL_NORMAL_ARRAY);
   1.140 +	}
   1.141 +	if(texcoords) {
   1.142 +		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
   1.143 +	}
   1.144 +}
   1.145 +
   1.146 +static void reshape(int x, int y)
   1.147 +{
   1.148 +	glViewport(0, 0, x, y);
   1.149 +
   1.150 +	glMatrixMode(GL_PROJECTION);
   1.151 +	glLoadIdentity();
   1.152 +	gluPerspective(50.0, (float)x / (float)y, 0.5, 1000.0);
   1.153 +}
   1.154 +
   1.155 +static void keyb(unsigned char key, int x, int y)
   1.156 +{
   1.157 +	switch(key) {
   1.158 +	case 27:
   1.159 +		exit(0);
   1.160 +	}
   1.161 +}
   1.162 +
   1.163 +static int bnstate[32];
   1.164 +static int prev_x, prev_y;
   1.165 +
   1.166 +static void mouse(int bn, int st, int x, int y)
   1.167 +{
   1.168 +	bnstate[bn - GLUT_LEFT_BUTTON] = (st == GLUT_DOWN);
   1.169 +	prev_x = x;
   1.170 +	prev_y = y;
   1.171 +}
   1.172 +
   1.173 +static void motion(int x, int y)
   1.174 +{
   1.175 +	int dx = x - prev_x;
   1.176 +	int dy = y - prev_y;
   1.177 +	prev_x = x;
   1.178 +	prev_y = y;
   1.179 +
   1.180 +	if(bnstate[0]) {
   1.181 +		cam_theta += dx * 0.5;
   1.182 +		cam_phi += dy * 0.5;
   1.183 +
   1.184 +		if(cam_phi < -90) cam_phi = -90;
   1.185 +		if(cam_phi > 90) cam_phi = 90;
   1.186 +		glutPostRedisplay();
   1.187 +	}
   1.188 +	if(bnstate[2]) {
   1.189 +		cam_dist += dy * 0.1;
   1.190 +
   1.191 +		if(cam_dist < 0) cam_dist = 0;
   1.192 +		glutPostRedisplay();
   1.193 +	}
   1.194 +}