#include "gfxutil.h"
#include "util.h"
#include "metasurf.h"
-#include "dynarr.h"
-
-struct mesh {
- int prim;
- struct g3d_vertex *varr;
- int16_t *iarr;
- int vcount, icount;
-};
+#include "mesh.h"
struct metaball {
float energy;
static void destroy(void);
static void start(long trans_time);
static void draw(void);
-static void draw_mesh(struct mesh *mesh);
-static void zsort(struct mesh *m);
static void calc_voxel_field(void);
-static float eval(struct metasurface *ms, float x, float y, float z);
-static void emit_vertex(struct metasurface *ms, float x, float y, float z);
static struct screen scr = {
"metaballs",
static float cam_theta, cam_phi = 25;
static float cam_dist = 10;
-static struct mesh mmesh;
+static struct g3d_mesh mmesh;
static struct metasurface *msurf;
#define VOL_SCALE 10.0f
#define VOX_DIST (VOL_SCALE / VOL_SZ)
#define VOL_HALF_SCALE (VOL_SCALE * 0.5f)
-static float *volume;
-#define VOXEL(x, y, z) (volume[(z) * VOL_SZ * VOL_SZ + (y) * VOL_SZ + (x)])
#define NUM_MBALLS 3
static struct metaball mball[NUM_MBALLS];
static int init(void)
{
- if(!(volume = malloc(VOL_SZ * VOL_SZ * VOL_SZ * sizeof *volume))) {
- fprintf(stderr, "failed to allocate %dx%dx%d voxel field\n", VOL_SZ, VOL_SZ, VOL_SZ);
- return -1;
- }
-
mball[0].energy = 1.2;
mball[1].energy = 0.8;
mball[2].energy = 1.0;
return -1;
}
msurf_set_resolution(msurf, VOL_SZ, VOL_SZ, VOL_SZ);
- msurf_set_bounds(msurf, 0, 0, 0, VOL_SCALE, VOL_SCALE, VOL_SCALE);
- msurf_eval_func(msurf, eval);
+ msurf_set_bounds(msurf, -VOL_HALF_SCALE, -VOL_HALF_SCALE, -VOL_HALF_SCALE,
+ VOL_HALF_SCALE, VOL_HALF_SCALE, VOL_HALF_SCALE);
msurf_set_threshold(msurf, 1.7);
msurf_set_inside(msurf, MSURF_GREATER);
- msurf_vertex_func(msurf, emit_vertex);
mmesh.prim = G3D_TRIANGLES;
mmesh.varr = 0;
static void destroy(void)
{
- dynarr_free(mmesh.varr);
+ msurf_free(msurf);
}
static void start(long trans_time)
static void update(void)
{
- static int prev_mx, prev_my;
- static unsigned int prev_bmask;
-
- if(mouse_bmask) {
- if((mouse_bmask ^ prev_bmask) == 0) {
- int dx = mouse_x - prev_mx;
- int dy = mouse_y - prev_my;
+ int i, j;
+ float tsec = time_msec / 1000.0f;
+ static float phase[] = {0.0, M_PI / 3.0, M_PI * 0.8};
+ static float speed[] = {0.8, 1.4, 1.0};
+ static float scale[][3] = {{1, 2, 0.8}, {0.5, 1.6, 0.6}, {1.5, 0.7, 0.5}};
+ static float offset[][3] = {{0, 0, 0}, {0.25, 0, 0}, {-0.2, 0.15, 0.2}};
- if(dx || dy) {
- if(mouse_bmask & 1) {
- cam_theta += dx * 1.0;
- cam_phi += dy * 1.0;
+ mouse_orbit_update(&cam_theta, &cam_phi, &cam_dist);
- if(cam_phi < -90) cam_phi = -90;
- if(cam_phi > 90) cam_phi = 90;
- }
- if(mouse_bmask & 4) {
- cam_dist += dy * 0.5;
+ for(i=0; i<NUM_MBALLS; i++) {
+ float t = (tsec + phase[i]) * speed[i];
- if(cam_dist < 0) cam_dist = 0;
- }
- }
- }
- }
- prev_mx = mouse_x;
- prev_my = mouse_y;
- prev_bmask = mouse_bmask;
-
- {
- int i, j;
- float tsec = time_msec / 1000.0f;
- static float phase[] = {0.0, M_PI / 3.0, M_PI * 0.8};
- static float speed[] = {0.8, 1.4, 1.0};
- static float scale[][3] = {{1, 2, 0.8}, {0.5, 1.6, 0.6}, {1.5, 0.7, 0.5}};
- static float offset[][3] = {{0, 0, 0}, {0.25, 0, 0}, {-0.2, 0.15, 0.2}};
-
- for(i=0; i<NUM_MBALLS; i++) {
- float t = (tsec + phase[i]) * speed[i];
-
- for(j=0; j<3; j++) {
- float x = sin(t + j * M_PI / 2.0);
- mball[i].pos[j] = offset[i][j] + x * scale[i][j];
- }
+ for(j=0; j<3; j++) {
+ float x = sin(t + j * M_PI / 2.0);
+ mball[i].pos[j] = offset[i][j] + x * scale[i][j];
}
}
calc_voxel_field();
-
- dynarr_free(mmesh.varr);
- mmesh.vcount = 0;
- mmesh.varr = dynarr_alloc(0, sizeof *mmesh.varr);
msurf_polygonize(msurf);
+
+ mmesh.vcount = msurf_vertex_count(msurf);
+ mmesh.varr = msurf_vertices(msurf);
}
static void draw(void)
{
+ int i, j;
+
update();
memset(fb_pixels, 0, fb_width * fb_height * 2);
+ for(i=0; i<120; i++) {
+ for(j=0; j<160; j++) {
+ fb_pixels[(i + 60) * 320 + (j + 80)] = 0x1e7;
+ }
+ }
+ g3d_viewport(80, 60, 160, 120);
+
g3d_matrix_mode(G3D_MODELVIEW);
g3d_load_identity();
g3d_translate(0, 0, -cam_dist);
g3d_light_pos(0, -10, 10, 20);
- zsort(&mmesh);
+ zsort_mesh(&mmesh);
g3d_mtl_diffuse(0.6, 0.6, 0.6);
draw_mesh(&mmesh);
- swap_buffers(fb_pixels);
-}
-
-static void draw_mesh(struct mesh *mesh)
-{
- if(mesh->iarr) {
- g3d_draw_indexed(mesh->prim, mesh->varr, mesh->vcount, mesh->iarr, mesh->icount);
- } else {
- g3d_draw(mesh->prim, mesh->varr, mesh->vcount);
- }
-}
-
-static struct {
- struct g3d_vertex *varr;
- const float *xform;
-} zsort_cls;
-
-static int zsort_cmp(const void *aptr, const void *bptr)
-{
- const int16_t *a = (const int16_t*)aptr;
- const int16_t *b = (const int16_t*)bptr;
-
- const float *m = zsort_cls.xform;
-
- const struct g3d_vertex *va = zsort_cls.varr + a[0];
- const struct g3d_vertex *vb = zsort_cls.varr + b[0];
-
- float za = m[2] * va->x + m[6] * va->y + m[10] * va->z + m[14];
- float zb = m[2] * vb->x + m[6] * vb->y + m[10] * vb->z + m[14];
+ g3d_viewport(0, 0, fb_width, fb_height);
- va = zsort_cls.varr + a[2];
- vb = zsort_cls.varr + b[2];
-
- za += m[2] * va->x + m[6] * va->y + m[10] * va->z + m[14];
- zb += m[2] * vb->x + m[6] * vb->y + m[10] * vb->z + m[14];
-
- return za - zb;
-}
-
-static void zsort(struct mesh *m)
-{
- int nfaces = m->icount / m->prim;
-
- zsort_cls.varr = m->varr;
- zsort_cls.xform = g3d_get_matrix(G3D_MODELVIEW, 0);
-
- qsort(m->iarr, nfaces, m->prim * sizeof *m->iarr, zsort_cmp);
+ swap_buffers(fb_pixels);
}
static void calc_voxel_field(void)
{
int i, j, k, b;
- float *voxptr = volume;
+ float *voxptr;
+
+ if(!(voxptr = msurf_voxels(msurf))) {
+ fprintf(stderr, "failed to allocate voxel field\n");
+ abort();
+ }
for(i=0; i<VOL_SZ; i++) {
- float z = VOL_SCALE * ((float)i / (float)VOL_SZ - 0.5);
+ float z = -VOL_HALF_SCALE + i * VOX_DIST;
for(j=0; j<VOL_SZ; j++) {
- float y = VOL_SCALE * ((float)j / (float)VOL_SZ - 0.5);
+ float y = -VOL_HALF_SCALE + j * VOX_DIST;
for(k=0; k<VOL_SZ; k++) {
- float x = VOL_SCALE * ((float)k / (float)VOL_SZ - 0.5);
+ float x = -VOL_HALF_SCALE + k * VOX_DIST;
float val = 0.0f;
for(b=0; b<NUM_MBALLS; b++) {
}
++dbg;
}
-
-static float eval(struct metasurface *ms, float x, float y, float z)
-{
- int xidx = cround64(VOL_SZ * x / VOL_SCALE);
- int yidx = cround64(VOL_SZ * y / VOL_SCALE);
- int zidx = cround64(VOL_SZ * z / VOL_SCALE);
-
- assert(xidx >= 0 && xidx < VOL_SZ);
- assert(yidx >= 0 && yidx < VOL_SZ);
- assert(zidx >= 0 && zidx < VOL_SZ);
-
- return VOXEL(xidx, yidx, zidx);
-}
-
-static void emit_vertex(struct metasurface *ms, float x, float y, float z)
-{
- struct g3d_vertex v;
- float val, len;
-
- v.x = x - VOL_HALF_SCALE;
- v.y = y - VOL_HALF_SCALE;
- v.z = z - VOL_HALF_SCALE;
- v.r = cround64(255.0 * x / VOL_SCALE);
- v.g = cround64(255.0 * y / VOL_SCALE);
- v.b = cround64(255.0 * z / VOL_SCALE);
-
- val = eval(ms, x, y, z);
- v.nx = eval(ms, x + VOX_DIST, y, z) - val;
- v.ny = eval(ms, x, y + VOX_DIST, z) - val;
- v.nz = eval(ms, x, y, z - VOX_DIST) - val;
-
- if((len = sqrt(v.nx * v.nx + v.ny * v.ny + v.nz * v.nz)) != 0.0f) {
- v.nx /= len;
- v.ny /= len;
- v.nz /= len;
- }
-
- mmesh.varr = dynarr_push(mmesh.varr, &v);
- assert(mmesh.varr);
- ++mmesh.vcount;
-}
-
-
projects / dosdemo / blobdiff