grid axes

[gba_blender] / src / main.c

diff --git a/src/main.c b/src/main.c
index 195f4a6..a519dc0 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -25,6 +25,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include "xgl.h"
 #include "polyfill.h"
 #include "debug.h"
+#include "meshdata.h"
 
 #define MENU_HEIGHT            17
 #define TRACK_HEIGHT   18
@@ -35,25 +36,40 @@ static void handle_keys(void);
 extern struct { unsigned char r, g, b; } bgimg_cmap[];
 extern unsigned char bgimg_pixels[];
 
-struct xvertex varr[] = {
-       {0, -0xd000},
-       {-0x8000, 0x7000},
-       {0x8000, 0x7000}
+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)
 {
        int i;
        unsigned int nframes = 0, backbuf;
-       unsigned long tm0, tm;
        uint16_t *cptr;
        unsigned char r, g, b;
        unsigned char *fbptr[2], *fb;
-       struct pvertex benchv[3] = {
-               {120 << 8, 8 << 8},
-               {75 << 8, 110 << 8},
-               {164 << 8, 80 << 8}
-       };
 
        intr_init();
        reset_msec_timer();
@@ -75,29 +91,21 @@ 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);
-
-       /* benchmark */
-       polyfill_framebuffer(fbptr[0] + 240 * MENU_HEIGHT, 240, VP_HEIGHT);
-       tm0 = timer_msec;
-       for(i=0; i<2048; i++) {
-               polyfill_flat(benchv, 3, 128 + (i & 0x7f));
-       }
-       tm = timer_msec - tm0;
-       emuprint("benchmark: %lu ms\n", tm);
+       xgl_viewport(0, 0, 240, VP_HEIGHT);
+       xgl_enable(XGL_LIGHTING);
 
-       /*key_repeat(500, 75, KEY_LEFT | KEY_RIGHT | KEY_DOWN | KEY_UP);*/
+       key_repeat(75, 75, KEY_LEFT | KEY_RIGHT | KEY_DOWN | KEY_UP);
 
        for(;;) {
+               handle_keys();
+
                backbuf = ++nframes & 1;
 
                fb = fbptr[backbuf] + 240 * MENU_HEIGHT;
@@ -105,8 +113,41 @@ int main(void)
                memset(fb, 14, 240 * VP_HEIGHT);
 
                xgl_load_identity();
-               xgl_rotate_z(nframes << 8);
-               xgl_draw(XGL_TRIANGLES, varr, 3);
+               xgl_translate(0, 0, 8 << 16);
+               xgl_rotate_x(cam_phi);
+               xgl_rotate_y(cam_theta);
+
+               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);
@@ -120,11 +161,35 @@ static void handle_keys(void)
        update_keyb();
 
        if(KEYPRESS(KEY_UP)) {
+               cam_phi += 0x2000;
+               if(cam_phi > X_HPI) cam_phi = X_HPI;
        }
        if(KEYPRESS(KEY_DOWN)) {
+               cam_phi -= 0x2000;
+               if(cam_phi < -X_HPI) cam_phi = -X_HPI;
        }
        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;
+               }
        }
 }