added crappy polygon filler

[dosdemo] / src / polytest.c

diff --git a/src/polytest.c b/src/polytest.c
index fb8d9af..5b43eea 100644 (file)
--- a/src/polytest.c
+++ b/src/polytest.c
@@ -1,19 +1,34 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include "screen.h"
+#include "demo.h"
+#include "3dgfx.h"
+
+struct mesh {
+       int prim;
+       struct g3d_vertex *varr;
+       unsigned int *iarr;
+       int vcount, icount;
+};
 
 static int init(void);
 static void destroy(void);
+static void start(long trans_time);
 static void draw(void);
+static void draw_mesh(struct mesh *mesh);
+static int gen_cube(struct mesh *mesh, float sz);
 
 static struct screen scr = {
        "polytest",
        init,
        destroy,
-       0, 0,
+       start, 0,
        draw
 };
 
+static struct mesh cube;
+
 struct screen *polytest_screen(void)
 {
        return &scr;
@@ -21,13 +36,130 @@ struct screen *polytest_screen(void)
 
 static int init(void)
 {
+       gen_cube(&cube, 1.0);
        return 0;
 }
 
 static void destroy(void)
 {
+       free(cube.varr);
+}
+
+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);
 }
 
 static void draw(void)
 {
+       static int prev_mx, prev_my;
+       static float theta, phi = 25;
+
+       int dx = mouse_x - prev_mx;
+       int dy = mouse_y - prev_my;
+       prev_mx = mouse_x;
+       prev_my = mouse_y;
+
+       if(dx || dy) {
+               theta += dx * 2.0;
+               phi += dy * 2.0;
+
+               if(phi < -90) phi = -90;
+               if(phi > 90) phi = 90;
+       }
+
+       /*float angle = (float)time_msec / 50.0;*/
+
+       memset(fb_pixels, 0, fb_width * fb_height * 2);
+
+       g3d_matrix_mode(G3D_MODELVIEW);
+       g3d_load_identity();
+       g3d_translate(0, 0, -5);
+       g3d_rotate(phi, 1, 0, 0);
+       g3d_rotate(theta, 0, 1, 0);
+
+       draw_mesh(&cube);
+}
+
+static void draw_mesh(struct mesh *mesh)
+{
+       if(mesh->iarr) {
+               /*g3d_draw_indexed(mesh->prim, mesh->iarr, mesh->icount, mesh->varr);*/
+       } else {
+               g3d_draw(mesh->prim, mesh->varr, mesh->vcount);
+       }
+}
+
+#define NORMAL(vp, x, y, z) do { vp->nx = x; vp->ny = y; vp->nz = z; } while(0)
+#define COLOR(vp, cr, cg, cb) do { vp->r = cr; vp->g = cg; vp->b = cb; } while(0)
+#define TEXCOORD(vp, tu, tv) do { vp->u = tu; vp->v = tv; } while(0)
+#define VERTEX(vp, vx, vy, vz) \
+       do { \
+               vp->x = vx; vp->y = vy; vp->z = vz; vp->w = 1.0f; \
+               ++vp; \
+       } while(0)
+
+static int gen_cube(struct mesh *mesh, float sz)
+{
+       struct g3d_vertex *vptr;
+       float hsz = sz / 2.0;
+
+       mesh->prim = G3D_QUADS;
+       mesh->iarr = 0;
+       mesh->icount = 0;
+
+       mesh->vcount = 24;
+       if(!(mesh->varr = malloc(mesh->vcount * sizeof *mesh->varr))) {
+               return -1;
+       }
+       vptr = mesh->varr;
+
+       /* -Z */
+       NORMAL(vptr, 0, 0, -1);
+       COLOR(vptr, 255, 0, 255);
+       VERTEX(vptr, hsz, -hsz, -hsz);
+       VERTEX(vptr, -hsz, -hsz, -hsz);
+       VERTEX(vptr, -hsz, hsz, -hsz);
+       VERTEX(vptr, hsz, hsz, -hsz);
+       /* -Y */
+       NORMAL(vptr, 0, -1, 0);
+       COLOR(vptr, 0, 255, 255);
+       VERTEX(vptr, -hsz, -hsz, -hsz);
+       VERTEX(vptr, hsz, -hsz, -hsz);
+       VERTEX(vptr, hsz, -hsz, hsz);
+       VERTEX(vptr, -hsz, -hsz, hsz);
+       /* -X */
+       NORMAL(vptr, -1, 0, 0);
+       COLOR(vptr, 255, 255, 0);
+       VERTEX(vptr, -hsz, -hsz, -hsz);
+       VERTEX(vptr, -hsz, -hsz, hsz);
+       VERTEX(vptr, -hsz, hsz, hsz);
+       VERTEX(vptr, -hsz, hsz, -hsz);
+       /* +X */
+       NORMAL(vptr, 1, 0, 0);
+       COLOR(vptr, 255, 0, 0);
+       VERTEX(vptr, hsz, -hsz, hsz);
+       VERTEX(vptr, hsz, -hsz, -hsz);
+       VERTEX(vptr, hsz, hsz, -hsz);
+       VERTEX(vptr, hsz, hsz, hsz);
+       /* +Y */
+       NORMAL(vptr, 0, 1, 0);
+       COLOR(vptr, 0, 255, 0);
+       VERTEX(vptr, -hsz, hsz, hsz);
+       VERTEX(vptr, hsz, hsz, hsz);
+       VERTEX(vptr, hsz, hsz, -hsz);
+       VERTEX(vptr, -hsz, hsz, -hsz);
+       /* +Z */
+       NORMAL(vptr, 0, 0, 1);
+       COLOR(vptr, 0, 0, 255);
+       VERTEX(vptr, -hsz, -hsz, hsz);
+       VERTEX(vptr, hsz, -hsz, hsz);
+       VERTEX(vptr, hsz, hsz, hsz);
+       VERTEX(vptr, -hsz, hsz, hsz);
+
+       return 0;
 }