9 #include "polyfill.h" /* just for struct pimage */
14 static int init(void);
15 static void destroy(void);
16 static void start(long trans_time);
17 static void draw(void);
18 static void draw_lowres_raster(void);
19 static int gen_texture(struct pimage *img, int xsz, int ysz);
21 static struct screen scr = {
29 static float cam_theta, cam_phi = 25;
30 static float cam_dist = 3;
31 static struct g3d_mesh cube, torus;
32 static struct bsptree torus_bsp;
34 static struct pimage tex;
36 static int use_bsp = 1;
38 #define LOWRES_SCALE 10
39 static uint16_t *lowres_pixels;
40 static int lowres_width, lowres_height;
42 struct screen *polytest_screen(void)
51 gen_cube_mesh(&cube, 1.0, 0);
52 gen_torus_mesh(&torus, 1.0, 0.25, 24, 12);
54 for(i=0; i<torus.vcount; i++) {
55 torus.varr[i].u *= 4.0;
56 torus.varr[i].v *= 2.0;
60 if(bsp_add_mesh(&torus_bsp, &torus) == -1) {
61 fprintf(stderr, "failed to construct torus BSP tree\n");
65 gen_texture(&tex, 128, 128);
68 lowres_width = fb_width / LOWRES_SCALE;
69 lowres_height = fb_height / LOWRES_SCALE;
70 lowres_pixels = malloc(lowres_width * lowres_height * 2);
71 scr.draw = draw_debug;
77 static void destroy(void)
83 destroy_bsp(&torus_bsp);
86 static void start(long trans_time)
88 g3d_matrix_mode(G3D_PROJECTION);
90 g3d_perspective(50.0, 1.3333333, 0.5, 100.0);
92 g3d_enable(G3D_CULL_FACE);
93 g3d_enable(G3D_LIGHTING);
94 g3d_enable(G3D_LIGHT0);
96 g3d_polygon_mode(G3D_TEX_GOURAUD);
99 static void update(void)
101 mouse_orbit_update(&cam_theta, &cam_phi, &cam_dist);
105 static void draw(void)
112 memset(fb_pixels, 0, fb_width * fb_height * 2);
114 g3d_matrix_mode(G3D_MODELVIEW);
116 g3d_translate(0, 0, -cam_dist);
118 g3d_mult_matrix(sball_matrix);
120 g3d_rotate(cam_phi, 1, 0, 0);
121 g3d_rotate(cam_theta, 0, 1, 0);
124 g3d_light_pos(0, -10, 10, 20);
126 g3d_mtl_diffuse(0.4, 0.7, 1.0);
127 g3d_set_texture(tex.width, tex.height, tex.pixels);
130 /* calc world-space view direction */
131 mat = g3d_get_matrix(G3D_MODELVIEW, 0);
132 /* transform (0, 0, -1) with transpose(mat3x3) */
137 draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
143 /*draw_mesh(&cube);*/
144 swap_buffers(fb_pixels);
147 static void draw_debug(void)
151 memset(lowres_pixels, 0, lowres_width * lowres_height * 2);
153 g3d_matrix_mode(G3D_MODELVIEW);
155 g3d_translate(0, 0, -cam_dist);
156 g3d_rotate(cam_phi, 1, 0, 0);
157 g3d_rotate(cam_theta, 0, 1, 0);
159 g3d_framebuffer(lowres_width, lowres_height, lowres_pixels);
163 draw_lowres_raster();
166 g3d_framebuffer(fb_width, fb_height, fb_pixels);
168 g3d_polygon_mode(G3D_WIRE);
170 g3d_polygon_mode(G3D_FLAT);
172 swap_buffers(fb_pixels);
176 static void draw_huge_pixel(uint16_t *dest, int dest_width, uint16_t color)
179 uint16_t grid_color = PACK_RGB16(127, 127, 127);
181 for(i=0; i<LOWRES_SCALE; i++) {
182 for(j=0; j<LOWRES_SCALE; j++) {
183 dest[j] = i == 0 || j == 0 ? grid_color : color;
189 static void draw_lowres_raster(void)
192 uint16_t *sptr = lowres_pixels;
193 uint16_t *dptr = fb_pixels;
195 for(i=0; i<lowres_height; i++) {
196 for(j=0; j<lowres_width; j++) {
197 draw_huge_pixel(dptr, fb_width, *sptr++);
198 dptr += LOWRES_SCALE;
200 dptr += fb_width * LOWRES_SCALE - fb_width;
204 static int gen_texture(struct pimage *img, int xsz, int ysz)
209 if(!(img->pixels = malloc(xsz * ysz * sizeof *pix))) {
214 for(i=0; i<ysz; i++) {
215 for(j=0; j<xsz; j++) {
218 *pix++ = PACK_RGB16(val, val, val);