#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <math.h>
#include "screen.h"
+#include "demo.h"
+#include "3dgfx.h"
+#include "gfxutil.h"
+#include "polyfill.h" /* just for struct pimage */
+#include "cfgopt.h"
+#include "mesh.h"
+#include "bsptree.h"
static int init(void);
static void destroy(void);
+static void start(long trans_time);
static void draw(void);
+static void draw_lowres_raster(void);
+static int gen_texture(struct pimage *img, int xsz, int ysz);
static struct screen scr = {
"polytest",
init,
destroy,
- 0, 0,
+ start, 0,
draw
};
+static float cam_theta, cam_phi = 25;
+static float cam_dist = 3;
+static struct g3d_mesh cube, torus;
+static struct bsptree torus_bsp;
+
+static struct pimage tex;
+
+#define LOWRES_SCALE 10
+static uint16_t *lowres_pixels;
+static int lowres_width, lowres_height;
+
struct screen *polytest_screen(void)
{
return &scr;
static int init(void)
{
+ int i;
+
+ gen_cube_mesh(&cube, 1.0, 0);
+ gen_torus_mesh(&torus, 1.0, 0.25, 24, 12);
+ /* scale texcoords */
+ for(i=0; i<torus.vcount; i++) {
+ torus.varr[i].u *= 4.0;
+ torus.varr[i].v *= 2.0;
+ }
+
+ init_bsp(&torus_bsp);
+ if(bsp_add_mesh(&torus_bsp, &torus) == -1) {
+ fprintf(stderr, "failed to construct torus BSP tree\n");
+ return -1;
+ }
+
+ gen_texture(&tex, 128, 128);
+
+#ifdef DEBUG_POLYFILL
+ lowres_width = fb_width / LOWRES_SCALE;
+ lowres_height = fb_height / LOWRES_SCALE;
+ lowres_pixels = malloc(lowres_width * lowres_height * 2);
+ scr.draw = draw_debug;
+#endif
+
return 0;
}
static void destroy(void)
{
+ free(lowres_pixels);
+ free(cube.varr);
+ free(torus.varr);
+ free(torus.iarr);
+ destroy_bsp(&torus_bsp);
+}
+
+static void start(long trans_time)
+{
+ g3d_matrix_mode(G3D_PROJECTION);
+ g3d_load_identity();
+ g3d_perspective(50.0, 1.3333333, 0.5, 100.0);
+
+ g3d_enable(G3D_CULL_FACE);
+ g3d_enable(G3D_LIGHTING);
+ g3d_enable(G3D_LIGHT0);
+
+ g3d_polygon_mode(G3D_TEX_GOURAUD);
+}
+
+static void update(void)
+{
+ mouse_orbit_update(&cam_theta, &cam_phi, &cam_dist);
}
+
static void draw(void)
{
+ float vdir[3];
+ float mat[16];
+
+ update();
+
+ memset(fb_pixels, 0, fb_width * fb_height * 2);
+
+ g3d_matrix_mode(G3D_MODELVIEW);
+ g3d_load_identity();
+ g3d_translate(0, 0, -cam_dist);
+ if(opt.sball) {
+ g3d_mult_matrix(sball_matrix);
+ } else {
+ g3d_rotate(cam_phi, 1, 0, 0);
+ g3d_rotate(cam_theta, 0, 1, 0);
+ }
+
+ /* calc world-space view direction */
+ g3d_get_matrix(G3D_MODELVIEW, mat);
+ /* transform (0, 0, -1) with transpose(mat3x3) */
+ vdir[0] = -mat[2];
+ vdir[1] = -mat[6];
+ vdir[2] = -mat[10];
+
+
+ g3d_light_pos(0, -10, 10, 20);
+
+ zsort_mesh(&torus);
+
+ g3d_mtl_diffuse(0.4, 0.7, 1.0);
+ g3d_set_texture(tex.width, tex.height, tex.pixels);
+
+ /*draw_mesh(&torus);*/
+ draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
+
+ /*draw_mesh(&cube);*/
+ swap_buffers(fb_pixels);
+}
+
+static void draw_debug(void)
+{
+ update();
+
+ memset(lowres_pixels, 0, lowres_width * lowres_height * 2);
+
+ g3d_matrix_mode(G3D_MODELVIEW);
+ g3d_load_identity();
+ g3d_translate(0, 0, -cam_dist);
+ g3d_rotate(cam_phi, 1, 0, 0);
+ g3d_rotate(cam_theta, 0, 1, 0);
+
+ g3d_framebuffer(lowres_width, lowres_height, lowres_pixels);
+ /*zsort(&torus);*/
+ draw_mesh(&cube);
+
+ draw_lowres_raster();
+
+
+ g3d_framebuffer(fb_width, fb_height, fb_pixels);
+
+ g3d_polygon_mode(G3D_WIRE);
+ draw_mesh(&cube);
+ g3d_polygon_mode(G3D_FLAT);
+
+ swap_buffers(fb_pixels);
+}
+
+
+static void draw_huge_pixel(uint16_t *dest, int dest_width, uint16_t color)
+{
+ int i, j;
+ uint16_t grid_color = PACK_RGB16(127, 127, 127);
+
+ for(i=0; i<LOWRES_SCALE; i++) {
+ for(j=0; j<LOWRES_SCALE; j++) {
+ dest[j] = i == 0 || j == 0 ? grid_color : color;
+ }
+ dest += dest_width;
+ }
+}
+
+static void draw_lowres_raster(void)
+{
+ int i, j;
+ uint16_t *sptr = lowres_pixels;
+ uint16_t *dptr = fb_pixels;
+
+ for(i=0; i<lowres_height; i++) {
+ for(j=0; j<lowres_width; j++) {
+ draw_huge_pixel(dptr, fb_width, *sptr++);
+ dptr += LOWRES_SCALE;
+ }
+ dptr += fb_width * LOWRES_SCALE - fb_width;
+ }
+}
+
+static int gen_texture(struct pimage *img, int xsz, int ysz)
+{
+ int i, j;
+ uint16_t *pix;
+
+ if(!(img->pixels = malloc(xsz * ysz * sizeof *pix))) {
+ return -1;
+ }
+ pix = img->pixels;
+
+ for(i=0; i<ysz; i++) {
+ for(j=0; j<xsz; j++) {
+ int val = i ^ j;
+
+ *pix++ = PACK_RGB16(val, val, val);
+ }
+ }
+
+ img->width = xsz;
+ img->height = ysz;
+ return 0;
}
projects / dosdemo / blobdiff