extern struct { unsigned char r, g, b; } bgimg_cmap[];
extern unsigned char bgimg_pixels[];
-static int32_t cam_theta, cam_phi;
+static int32_t cam_theta = 0x10000, cam_phi = -0x8000;
+
+static int show_obj = 1, show_del;
+
+#define AXIS0 0x10000
+#define AXIS1 0x80000
+
+static struct xvertex gridaxes[] = {
+ {AXIS0, 0, 0, 0, 0, 0, 92},
+ {AXIS1, 0, 0, 0, 0, 0, 92},
+ {-AXIS0, 0, 0, 0, 0, 0, 92},
+ {-AXIS1, 0, 0, 0, 0, 0, 92},
+ {0, 0, AXIS0, 0, 0, 0, 93},
+ {0, 0, AXIS1, 0, 0, 0, 93},
+ {0, 0, -AXIS0, 0, 0, 0, 93},
+ {0, 0, -AXIS1, 0, 0, 0, 93},
+
+ {0, 0, 0, 0, 0, 0, 92},
+ {AXIS1, 0, 0, 0, 0, 0, 92},
+ {0, 0, 0, 0, 0, 0, 92},
+ {-AXIS1, 0, 0, 0, 0, 0, 92},
+ {0, 0, 0, 0, 0, 0, 93},
+ {0, 0, AXIS1, 0, 0, 0, 93},
+ {0, 0, -0, 0, 0, 0, 93},
+ {0, 0, -AXIS1, 0, 0, 0, 93},
+};
int main(void)
{
*cptr++ = r | (g << 5) | (b << 10);
}
for(i=0; i<128; i++) {
- r = (rand() & 0xf) + 8;
- g = (rand() & 0xf) + 8;
- b = (rand() & 0xf) + 8;
- *cptr++ = r | (g << 5) | (b << 10);
+ r = i / 5 + 6;
+ *cptr++ = r | (r << 5) | (r << 10);
}
memcpy(fbptr[0], bgimg_pixels, 240 * 160);
memcpy(fbptr[1], bgimg_pixels, 240 * 160);
xgl_init();
- xgl_viewport(0, MENU_HEIGHT, 240, VP_HEIGHT);
+ xgl_viewport(0, 0, 240, VP_HEIGHT);
+ xgl_enable(XGL_LIGHTING);
key_repeat(75, 75, KEY_LEFT | KEY_RIGHT | KEY_DOWN | KEY_UP);
memset(fb, 14, 240 * VP_HEIGHT);
xgl_load_identity();
- xgl_translate(0, 0, 5 << 16);
+ xgl_translate(0, 0, 8 << 16);
xgl_rotate_x(cam_phi);
xgl_rotate_y(cam_theta);
- xgl_draw(XGL_QUADS, cube, sizeof cube / sizeof *cube);
+
+ if(show_obj) {
+ if(cam_theta < X_PI) {
+ xgl_draw(XGL_LINES, gridaxes + 2, 2); /* -X */
+ } else {
+ xgl_draw(XGL_LINES, gridaxes, 2); /* +X */
+ }
+ if(cam_theta < X_HPI || cam_theta > (3 * X_HPI)) {
+ xgl_draw(XGL_LINES, gridaxes + 4, 2); /* +Z */
+ } else {
+ xgl_draw(XGL_LINES, gridaxes + 6, 2); /* -Z */
+ }
+
+ if(show_obj == 1) {
+ xgl_draw(XGL_QUADS, cube, sizeof cube / sizeof *cube);
+ } else {
+ xgl_draw(XGL_TRIANGLES, suzanne, sizeof suzanne / sizeof *suzanne);
+ }
+
+ if(cam_theta < X_PI) {
+ xgl_draw(XGL_LINES, gridaxes, 2); /* +X */
+ } else {
+ xgl_draw(XGL_LINES, gridaxes + 2, 2); /* -X */
+ }
+ if(cam_theta < X_HPI || cam_theta > (3 * X_HPI)) {
+ xgl_draw(XGL_LINES, gridaxes + 6, 2); /* -Z */
+ } else {
+ xgl_draw(XGL_LINES, gridaxes + 4, 2); /* +Z */
+ }
+ } else {
+ xgl_draw(XGL_LINES, gridaxes + 8, 8);
+ }
wait_vblank();
present(backbuf);
}
if(KEYPRESS(KEY_LEFT)) {
cam_theta += 0x2000;
+ if(cam_theta > X_2PI) cam_theta -= X_2PI;
}
if(KEYPRESS(KEY_RIGHT)) {
cam_theta -= 0x2000;
+ if(cam_theta < 0) cam_theta += X_2PI;
+ }
+ if(KEYPRESS(KEY_RT)) {
+ if(++show_obj > 2) show_obj = 0;
+ }
+ if(KEYPRESS(KEY_LT)) {
+ if(--show_obj < 0) show_obj = 2;
+ }
+
+ if(KEYPRESS(KEY_A)) {
+ show_del ^= 1;
+ }
+ if(KEYPRESS(KEY_B)) {
+ if(show_del) {
+ show_obj = 0;
+ show_del = 0;
+ }
}
}