X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Frasterize;a=blobdiff_plain;f=scene.c;h=85f15e6c02f093b61c7e7ddd1ac384faa80e0385;hp=940767d4f339b6ea44478a8821c1cd6e4f7bd49f;hb=09dd89d10e65029f0be313dd463ba1f43cac2fbb;hpb=c875478cdd823c7df8fdc859941bd9e5948c9315

diff --git a/scene.c b/scene.c
index 940767d..85f15e6 100644
--- a/scene.c
+++ b/scene.c
@@ -6,180 +6,166 @@
  */
 
 #include <errno.h>
-#include <stdio.h>
-#include <string.h>
 
-#include "common.h"
-#include "mat.h"
 #include "list.h"
+#include "model.h"
+#include "mat.h"
 #include "scene.h"
-#include "tri.h"
-
-
-#if FIND_NORMALS == 2
 
-#include "map.h"
-DECLARE_AND_DEFINE_MAP_TYPE3(vec_t, list_t*, vnorm, vec_compare(*a, *b));
 
+static int _model_set_colors(model_t* m, FILE* file);
+static int _model_add_translate(model_t* m, FILE* file);
+static int _model_add_rotate(model_t* m, FILE* file);
+static int _model_add_scale(model_t* m, FILE* file);
+static int _model_set_material(model_t* m, FILE* file);
+static int _scene_set_ambient(scene_t* s, FILE* file);
+static int _scene_add_light(scene_t* s, FILE* file);
 
-/*
- * Associate a triangle with one of its vertices.
- */
-static void _find_normals_add_vertex(map_t* m, vec_t v, tri_t* t)
-{
-    list_t** l = map_vnorm_search(m, v);
-    if (l == NULL) {
-        map_vnorm_data_t* d = map_vnorm_insert(m, v, NULL);
-        l = &d->val;
-    }
-    list_push(l, t);
-}
 
-/*
- * Associate a triangle with all of its vertices.
- */
-static void _find_normals_add_triangle(map_t* m, tri_t* t)
+struct scene
 {
-    _find_normals_add_vertex(m, t->a.v, t);
-    _find_normals_add_vertex(m, t->b.v, t);
-    _find_normals_add_vertex(m, t->c.v, t);
-}
+    list_t* models;
+    int     w, h;
+    mat_t   view;
+    mat_t   projection;
+    vec_t   eye;
+    list_t* lights;
+    color_t ambient;
+};
 
 
-/*
- * Calculate an averaged normal from a list of triangles that share a common
- * vertex.
- */
-static void _find_normals_average(const vec_t* v, list_t** l)
+scene_t* scene_alloc(FILE* file)
 {
-    // first, compute the average normal
-    vec_t n = VEC_ZERO;
-    for (list_t* i = *l; i; i = i->link) {
-        tri_t* t = (tri_t*)i->val;
-        n = vec_add(n, tri_normal(*t));
+    int w, h;
+    double eyeX, eyeY, eyeZ, spotX, spotY, spotZ, upX, upY, upZ;
+    double fovy, aspect, near, far;
+    if (fscanf(file, "U3 %d %d %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf",
+               &w, &h,
+               &eyeX, &eyeY, &eyeZ, &spotX, &spotY, &spotZ, &upX, &upY, &upZ,
+               &fovy, &aspect, &near, &far) != 15) {
+        fprintf(stderr, "Cannot read scene header.\n");
+        return NULL;
     }
-    n = vec_normalize(n);
 
-    // set the normal on each triangle's vertex that is shared
-    while (*l) {
-        tri_t* t = (tri_t*)(*l)->val;
-        if (vec_isequal(*v, t->a.v)) {
-            t->a.n = n;
-        }
-        else if (vec_isequal(*v, t->b.v)) {
-            t->b.n = n;
-        }
-        else if (vec_isequal(*v, t->c.v)) {
-            t->c.n = n;
-        }
-        list_pop(l);
-    }
+    scene_t* s = (scene_t*)mem_alloc(sizeof(scene_t));
+    s->models = NULL;
+    s->w = w;
+    s->h = h;
+    s->view = MAT_LOOKAT(vec_new( (scal_t)eyeX,  (scal_t)eyeY,  (scal_t)eyeZ),
+                         vec_new((scal_t)spotX, (scal_t)spotY, (scal_t)spotZ),
+                         vec_new(  (scal_t)upX,   (scal_t)upY,   (scal_t)upZ));
+    s->eye = vec_new(eyeX, eyeY, eyeZ);
+    s->projection = MAT_PERSPECTIVE((scal_t)fovy, (scal_t)aspect, (scal_t)near, (scal_t)far);
+    s->lights = NULL;
+    s->ambient = color_new(S(0.05), S(0.05), S(0.05), S(1.0));
+
+    char filename[4096];
+    model_t* m = NULL;
+
+#define _ASSERT_G  \
+if (m == NULL) { \
+    fprintf(stderr, "Unexpected line before group is specified.\n"); \
+    goto fail; \
 }
 
-#endif // FIND_NORMALS
+    char type;
+    while (fscanf(file, " %c", &type) == 1) {
+        switch (type) {
+            case 'g':
+                if (fgets(filename, 4096, file) == NULL) {
+                    fprintf(stderr, "Cannot read model filename.\n");
+                }
+                m = model_alloc(trim(filename));
+                if (m == NULL) {
+                    goto fail;
+                }
+                list_push2(&s->models, m, DTOR(model_destroy));
+                break;
 
+            case 'c':
+                _ASSERT_G;
+                if (_model_set_colors(m, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-/*
- * A group of triangles and a transformation.
- */
-struct _group
-{
-    list_t*     triangles;
-    mat_t       model;
-#if RENDER_PROGRESS
-    char*       name;
-    int         count;
-#define IF_RENDER_PROGRESS(X) X
-#else
-#define IF_RENDER_PROGRESS(X)
-#endif
-};
-typedef struct _group _group_t;
+            case 't':
+                _ASSERT_G;
+                if (_model_add_translate(m, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-/*
- * Allocate a group by reading raw triangle coordinates from a file.
- */
-static _group_t* _group_alloc(const char* filename)
-{
-    FILE* file = fopen(filename, "r");
-    if (file == NULL) {
-        fprintf(stderr, "Cannot read %s: %s\n", filename, strerror(errno));
-        return NULL;
-    }
+            case 'r':
+                if (_model_add_rotate(m, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-    _group_t* g = (_group_t*)mem_alloc(sizeof(_group_t));
-    g->triangles = NULL;
-    g->model = MAT_IDENTITY;
-#if RENDER_PROGRESS
-    g->name = mem_strdup(filename);
-    g->count = 0;
-#endif
+            case 's':
+                _ASSERT_G;
+                if (_model_add_scale(m, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-#if FIND_NORMALS == 2
-    map_t*  m = map_vnorm_alloc();
-#endif
+            case 'A':
+                if (_scene_set_ambient(s, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-    double x1, y1, z1, x2, y2, z2, x3, y3, z3;
-    while (fscanf(file, " %lf %lf %lf %lf %lf %lf %lf %lf %lf",
-                  &x1, &y1, &z1, &x2, &y2, &z2, &x3, &y3, &z3) == 9) {
-        tri_t* t = tri_alloc(
-            vert_new2((scal_t)x1, (scal_t)y1, (scal_t)z1),
-            vert_new2((scal_t)x2, (scal_t)y2, (scal_t)z2),
-            vert_new2((scal_t)x3, (scal_t)y3, (scal_t)z3)
-        );
-        list_push2(&g->triangles, t, mem_free);
-        IF_RENDER_PROGRESS(++g->count);
-
-#if FIND_NORMALS == 1
-        vec_t n = vec_normalize(tri_normal(*t));
-        t->a.n = n;
-        t->b.n = n;
-        t->c.n = n;
-#elif FIND_NORMALS == 2
-        _find_normals_add_triangle(m, t);
-#endif
-    }
+            case 'L':
+                if (_scene_add_light(s, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-#if FIND_NORMALS == 2
-    map_vnorm_call(m, _find_normals_average);
-    rbtree_destroy(m);
-#endif
+            case 'M':
+                _ASSERT_G;
+                if (_model_set_material(m, file) != 0) {
+                    goto fail;
+                }
+                break;
 
-    fclose(file);
+            case 'X':
+                goto done;
 
-    if (g->triangles == NULL) {
-        fprintf(stderr, "No triangles coordinates read from %s\n", filename);
-        mem_free(g);
-        return NULL;
+            default:
+                fprintf(stderr, "Unknown identifier: %c\n", type);
+        }
     }
+#undef _ASSERT_G
+
+done:
+    return s;
 
-    return g;
+fail:
+    scene_destroy(s);
+    return NULL;
 }
 
-/*
- * Destroy a group.
- */
-static void _group_destroy(_group_t* g)
+void scene_destroy(scene_t* s)
 {
-    IF_RENDER_PROGRESS(mem_free(g->name));
-    list_destroy(g->triangles);
-    mem_free(g);
+    list_destroy(&s->models);
+    list_destroy(&s->lights);
+    mem_free(s);
 }
 
 
 /*
  * Set the colors of the triangles in the group as defined in a file.
  */
-static int _group_set_colors(_group_t* g, FILE* file)
+static int _model_set_colors(model_t* m, FILE* file)
 {
     double r1, g1, b1, r2, g2, b2, r3, g3, b3;
     if (fscanf(file, " %lf %lf %lf %lf %lf %lf %lf %lf %lf",
                &r1, &g1, &b1, &r2, &g2, &b2, &r3, &g3, &b3) != 9) {
-        fprintf(stderr, "Cannot read color values from scene file.\n");
+        fprintf(stderr, "Cannot read color values from scene.\n");
         return -1;
     }
 
-    for (list_t* i = g->triangles; i; i = i->link) {
+    for (const list_t* i = model_geometry(m); i; i = i->link) {
         tri_t* t = (tri_t*)i->val;
         t->a.c = color_new((colorchan_t)r1, (colorchan_t)g1, (colorchan_t)b1, S(1.0));
         t->b.c = color_new((colorchan_t)r2, (colorchan_t)g2, (colorchan_t)b2, S(1.0));
@@ -191,161 +177,100 @@ static int _group_set_colors(_group_t* g, FILE* file)
 /*
  * Concat a translation matrix to the transformation as defined in a file.
  */
-static int _group_add_translate(_group_t* g, FILE* file)
+static int _model_add_translate(model_t* m, FILE* file)
 {
     double tx, ty, tz;
     if (fscanf(file, " %lf %lf %lf", &tx, &ty, &tz) != 3) {
-        fprintf(stderr, "Cannot read translate coordinates from scene file.\n");
+        fprintf(stderr, "Cannot read translate coordinates from scene.\n");
         return -1;
     }
-    g->model = mat_mult(g->model, MAT_TRANSLATE((scal_t)tx, (scal_t)ty, (scal_t)tz));
+    mat_t transform = MAT_TRANSLATE((scal_t)tx, (scal_t)ty, (scal_t)tz);
+    model_transform(m, &transform);
     return 0;
 }
 
 /*
  * Concat a rotation matrix to the transformation as defined in a file.
  */
-static int _group_add_rotate(_group_t* g, FILE* file)
+static int _model_add_rotate(model_t* m, FILE* file)
 {
     double theta, ax, ay, az;
     if (fscanf(file, " %lf %lf %lf %lf", &theta, &ax, &ay, &az) != 4) {
-        fprintf(stderr, "Cannot read rotation angle from scene file.\n");
+        fprintf(stderr, "Cannot read rotation angle from scene.\n");
         return -1;
     }
-    g->model = mat_mult(g->model, MAT_ROTATE((scal_t)theta, (scal_t)ax, (scal_t)ay, (scal_t)az));
+    mat_t transform = MAT_ROTATE((scal_t)theta, (scal_t)ax, (scal_t)ay, (scal_t)az);
+    model_transform(m, &transform);
     return 0;
 }
 
 /*
  * Concat a scale matrix to the transformation as defined in a file.
  */
-static int _group_add_scale(_group_t* g, FILE* file)
+static int _model_add_scale(model_t* m, FILE* file)
 {
     double sx, sy, sz;
     if (fscanf(file, " %lf %lf %lf", &sx, &sy, &sz) != 3) {
-        fprintf(stderr, "Cannot read scale factors from scene file.\n");
+        fprintf(stderr, "Cannot read scale factors from scene.\n");
         return -1;
     }
-    g->model = mat_mult(g->model, MAT_SCALE((scal_t)sx, (scal_t)sy, (scal_t)sz));
+    mat_t transform = MAT_SCALE((scal_t)sx, (scal_t)sy, (scal_t)sz);
+    model_transform(m, &transform);
     return 0;
 }
 
-
-struct scene
-{
-    list_t* groups;
-    list_t* lights;
-    int     w, h;
-    mat_t   view;
-    mat_t   projection;
-    vec_t   eye;
-};
-
-scene_t* scene_alloc(const char* filename)
+/*
+ * Set the specular highlight and shininess factor for the group.
+ */
+static int _model_set_material(model_t* m, FILE* file)
 {
-    FILE* file = fopen(filename, "r");
-    if (file == NULL) {
-        fprintf(stderr, "Cannot read %s: %s\n", filename, strerror(errno));
-        return NULL;
-    }
-
-    int w, h;
-    double eyeX, eyeY, eyeZ, spotX, spotY, spotZ, upX, upY, upZ;
-    double fovy, aspect, near, far;
-    if (fscanf(file, "U3 %d %d %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf %lf",
-               &w, &h,
-               &eyeX, &eyeY, &eyeZ, &spotX, &spotY, &spotZ, &upX, &upY, &upZ,
-               &fovy, &aspect, &near, &far) != 15) {
-        fprintf(stderr, "Cannot read scene file header.\n");
-        return NULL;
+    double sr, sg, sb, shininess;
+    if (fscanf(file, " %lf %lf %lf %lf", &sr, &sg, &sb, &shininess) != 4) {
+        fprintf(stderr, "Cannot read material information from scene.\n");
+        return -1;
     }
-
-    scene_t* s = (scene_t*)mem_alloc(sizeof(scene_t));
-    s->groups = NULL;
-    s->w = w;
-    s->h = h;
-    s->view = MAT_LOOKAT(vec_new( (scal_t)eyeX,  (scal_t)eyeY,  (scal_t)eyeZ),
-                         vec_new((scal_t)spotX, (scal_t)spotY, (scal_t)spotZ),
-                         vec_new(  (scal_t)upX,   (scal_t)upY,   (scal_t)upZ));
-    s->eye = vec_new(eyeX, eyeY, eyeZ);
-    s->projection = MAT_PERSPECTIVE((scal_t)fovy, (scal_t)aspect, (scal_t)near, (scal_t)far);
-
-    char grp_filename[4096];
-    _group_t* g = NULL;
-
-#define _ASSERT_G  \
-if (g == NULL) { \
-    fprintf(stderr, "Unexpected line before group is specified.\n"); \
-    goto fail; \
+    model_material(m, color_new((scal_t)sr, (scal_t)sg, (scal_t)sb, S(1.0)), (scal_t)shininess);
+    return 0;
 }
 
-    char type;
-    while (fscanf(file, " %c", &type) == 1) {
-        switch (type) {
-            case 'g':
-                if (fgets(grp_filename, 4096, file) == NULL) {
-                    fprintf(stderr, "Cannot read raw triangle filename.\n");
-                }
-                trim(grp_filename);
-                g = _group_alloc(grp_filename);
-                if (g == NULL) {
-                    goto fail;
-                }
-                list_push2(&s->groups, g, DTOR(_group_destroy));
-                break;
-
-            case 'c':
-                _ASSERT_G;
-                if (_group_set_colors(g, file) != 0) {
-                    goto fail;
-                }
-                break;
-
-            case 't':
-                _ASSERT_G;
-                if (_group_add_translate(g, file) != 0) {
-                    goto fail;
-                }
-                break;
-
-            case 'r':
-                if (_group_add_rotate(g, file) != 0) {
-                    goto fail;
-                }
-                break;
-
-            case 's':
-                _ASSERT_G;
-                if (_group_add_scale(g, file) != 0) {
-                    goto fail;
-                }
-                break;
-
-            default:
-                fprintf(stderr, "Unknown identifier: %c\n", type);
-        }
+/*
+ * Set the ambient light properties of a scene.
+ */
+static int _scene_set_ambient(scene_t* s, FILE* file)
+{
+    double r, g, b;
+    if (fscanf(file, " %lf %lf %lf", &r, &g, &b) != 3) {
+        fprintf(stderr, "Cannot read ambient light from scene.\n");
+        return -1;
     }
-
-#undef _ASSERT_G
-
-    fclose(file);
-    return s;
-
-fail:
-    scene_destroy(s);
-    return NULL;
+    s->ambient = color_new((scal_t)r, (scal_t)g, (scal_t)b, S(1.0));
+    return 0;
 }
 
-void scene_destroy(scene_t* s)
+/*
+ * Add a light to the scene.
+ */
+static int _scene_add_light(scene_t* s, FILE* file)
 {
-    list_destroy(s->groups);
-    mem_free(s);
+    double lx, ly, lz, dr, dg, db, sr, sg, sb;
+    if (fscanf(file, " %lf %lf %lf %lf %lf %lf %lf %lf %lf",
+               &lx, &ly, &lz, &dr, &dg, &db, &sr, &sg, &sb) != 9) {
+        fprintf(stderr, "Cannot read light values from scene.\n");
+        return -1;
+    }
+    light_t* l = light_alloc(
+            vec_new(lx, ly, lz),
+            color_new(dr, dg, db, S(1.0)),
+            color_new(sr, sg, sb, S(1.0))
+    );
+    list_push2(&s->lights, l, mem_free);
+    return 0;
 }
 
 
 raster_t* scene_render(scene_t* s)
 {
-#if RENDER_TIMER
+#if VERBOSITY >= 3
     timer_start();
 #endif
 
@@ -353,38 +278,24 @@ raster_t* scene_render(scene_t* s)
     raster_view(p, &s->view);
     raster_projection(p, &s->projection);
     raster_eye(p, s->eye);
+    raster_ambient(p, s->ambient);
 
-    raster_light(p, light_new(COLOR_WHITE, vec_new(S(5.0), S(3.0), S(6.0))));
-    raster_light(p, light_new(COLOR_MAGENTA, vec_new(S(-2.0), S(2.0), S(-2.0))));
+    for (list_t* i = s->lights; i; i = i->link) {
+        raster_light(p, *(light_t*)i->val);
+    }
 
-#if RENDER_PROGRESS
-#define PROGRESS_FMT "\033[80D\033[2K  %s\t %9d / %d"
-    int tri;
-    printf("render scene:\n");
+#if VERBOSITY >= 3
+    printf("rendering scene...\n");
 #endif
 
-    for (list_t* gi = s->groups; gi; gi = gi->link) {
-        _group_t* g = (_group_t*)gi->val;
-        raster_model(p, &g->model);
-        IF_RENDER_PROGRESS(tri = 0);
-        for (list_t* ti = g->triangles; ti; ti = ti->link) {
-#if RENDER_PROGRESS
-            if (++tri % 100 == 0) {
-                printf(PROGRESS_FMT, g->name, tri, g->count);
-                fflush(stdout);
-            }
-#endif
-            raster_draw_tri(p, (tri_t*)ti->val);
-        }
-#if RENDER_PROGRESS
-        printf(PROGRESS_FMT"\n", g->name, tri, g->count);
-#endif
+    for (list_t* gi = s->models; gi; gi = gi->link) {
+        model_t* m = (model_t*)gi->val;
+        raster_draw_model(p, m);
     }
-    IF_RENDER_PROGRESS(printf("render complete!\n"));
 
-#if RENDER_TIMER
+#if VERBOSITY >= 3
     long dt = timer_stop();
-    printf("time\t%.3fms\n", (float)dt / 1000.0f);
+    printf("render complete!\ntime\t%.3fms\n", (float)dt / 1000.0f);
 #endif
 
     return p;