X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=csgray;a=blobdiff_plain;f=src%2Fcsgray.c;h=150f5fb30c5bbfab48cbb13543daf79d62c2ba84;hp=35bb5a84bd6bf8ac640349458108ab5c6412ebc0;hb=33b3cb144e8762bbb67424fd68374f92d85cdc3d;hpb=07f86df1b104515376419c7a214253fb435fc396 diff --git a/src/csgray.c b/src/csgray.c index 35bb5a8..150f5fb 100644 --- a/src/csgray.c +++ b/src/csgray.c @@ -3,6 +3,7 @@ #include #include #include +#include #include "csgimpl.h" #include "matrix.h" #include "geom.h" @@ -12,6 +13,7 @@ static int ray_trace(struct ray *ray, float *col); static void shade(float *col, struct ray *ray, struct hit *hit); static void background(float *col, struct ray *ray); static int find_intersection(struct ray *ray, struct hit *best); +static csg_object *load_object(struct ts_node *node); static float ambient[3]; static struct camera cam; @@ -58,12 +60,49 @@ void csg_fov(float fov) int csg_load(const char *fname) { - return 0; /* TODO */ + struct ts_node *root = 0, *c; + csg_object *o; + + if(!(root = ts_load(fname))) { + fprintf(stderr, "failed to open %s\n", fname); + return -1; + } + if(strcmp(root->name, "csgray_scene") != 0) { + fprintf(stderr, "invalid scene file: %s\n", fname); + goto err; + } + + c = root->child_list; + while(c) { + if(strcmp(c->name, "viewer") == 0) { + static float def_pos[] = {0, 0, 5}; + static float def_targ[] = {0, 0, 0}; + + float *p = ts_get_attr_vec(c, "position", def_pos); + float *t = ts_get_attr_vec(c, "target", def_targ); + + csg_view(p[0], p[1], p[2], t[0], t[1], t[2]); + csg_fov(ts_get_attr_num(c, "fov", 50.0f)); + + } else if((o = load_object(c))) { + csg_add_object(o); + } + c = c->next; + } + + ts_free_tree(root); + return 0; + +err: + if(root) { + ts_free_tree(root); + } + return -1; } int csg_save(const char *fname) { - return 0; /* TODO */ + return -1; /* TODO */ } void csg_add_object(csg_object *o) @@ -278,6 +317,35 @@ void csg_metallic(csg_object *o, int m) o->ob.metallic = m; } +void csg_reset_xform(csg_object *o) +{ + mat4_identity(o->ob.xform); + mat4_identity(o->ob.inv_xform); +} + +void csg_translate(csg_object *o, float x, float y, float z) +{ + mat4_translate(o->ob.xform, x, y, z); + mat4_pre_translate(o->ob.inv_xform, -x, -y, -z); +} + +void csg_rotate(csg_object *o, float angle, float x, float y, float z) +{ + mat4_rotate(o->ob.xform, angle, x, y, z); + mat4_pre_rotate(o->ob.inv_xform, -angle, x, y, z); +} + +void csg_scale(csg_object *o, float x, float y, float z) +{ + mat4_scale(o->ob.xform, x, y, z); + mat4_pre_scale(o->ob.inv_xform, 1.0f / x, 1.0f / y, 1.0f / z); +} + +void csg_lookat(csg_object *o, float x, float y, float z, float tx, float ty, float tz, float ux, float uy, float uz) +{ + mat4_lookat(o->ob.xform, x, y, z, tx, ty, tz, ux, uy, uz); + mat4_inv_lookat(o->ob.inv_xform, x, y, z, tx, ty, tz, ux, uy, uz); +} void csg_render_pixel(int x, int y, int width, int height, float aspect, float *color) { @@ -453,3 +521,122 @@ static int find_intersection(struct ray *ray, struct hit *best) return best->o != 0; } + +static csg_object *load_object(struct ts_node *node) +{ + float *avec; + struct ts_node *c; + csg_object *sub, *o = 0, *olist = 0, *otail = 0; + int num_subobj = 0, is_csgop = 0; + + if(strcmp(node->name, "null") == 0) { + if(!(o = csg_null(0, 0, 0))) { + goto err; + } + + } else if(strcmp(node->name, "sphere") == 0) { + float rad = ts_get_attr_num(node, "radius", 1.0f); + if(!(o = csg_sphere(0, 0, 0, rad))) { + goto err; + } + + } else if(strcmp(node->name, "plane") == 0) { + static float def_norm[] = {0, 1, 0}; + float *norm = ts_get_attr_vec(node, "normal", def_norm); + if(!(o = csg_plane(0, 0, 0, norm[0], norm[1], norm[2]))) { + goto err; + } + + } else if(strcmp(node->name, "box") == 0) { + static float def_sz[] = {1, 1, 1}; + float *sz = ts_get_attr_vec(node, "size", def_sz); + if(!(o = csg_box(0, 0, 0, sz[0], sz[1], sz[2]))) { + goto err; + } + + } else if(strcmp(node->name, "union") == 0) { + if(!(o = csg_union(0, 0))) { + goto err; + } + is_csgop = 1; + + } else if(strcmp(node->name, "intersect") == 0) { + if(!(o = csg_intersection(0, 0))) { + goto err; + } + is_csgop = 1; + + } else if(strcmp(node->name, "subtract") == 0) { + if(!(o = csg_subtraction(0, 0))) { + goto err; + } + is_csgop = 1; + + } else { + goto err; + } + + if(is_csgop) { + c = node->child_list; + while(c) { + if((sub = load_object(c))) { + if(olist) { + otail->ob.next = sub; + otail = sub; + } else { + olist = otail = sub; + } + ++num_subobj; + } + c = c->next; + } + + if(num_subobj != 2) { + goto err; + } + o->un.a = olist; + o->un.b = olist->ob.next; + olist->ob.next = 0; + } + + if((avec = ts_get_attr_vec(node, "position", 0))) { + csg_translate(o, avec[0], avec[1], avec[2]); + } + if((avec = ts_get_attr_vec(node, "rotaxis", 0))) { + csg_rotate(o, ts_get_attr_num(node, "rotangle", 0.0f), avec[0], avec[1], avec[2]); + } + if((avec = ts_get_attr_vec(node, "scaling", 0))) { + csg_scale(o, avec[0], avec[1], avec[2]); + } + if((avec = ts_get_attr_vec(node, "target", 0))) { + /* don't move this before position */ + float def_up[] = {0, 1, 0}; + float *up = ts_get_attr_vec(node, "up", def_up); + float x = o->ob.xform[12]; + float y = o->ob.xform[13]; + float z = o->ob.xform[14]; + csg_lookat(o, x, y, z, avec[0], avec[1], avec[2], up[0], up[1], up[2]); + } + + if((avec = ts_get_attr_vec(node, "color", 0))) { + csg_color(o, avec[0], avec[1], avec[2]); + } + if((avec = ts_get_attr_vec(node, "emission", 0))) { + csg_emission(o, avec[0], avec[1], avec[2]); + } + + csg_roughness(o, ts_get_attr_num(node, "roughness", o->ob.roughness)); + csg_opacity(o, ts_get_attr_num(node, "opacity", o->ob.opacity)); + csg_metallic(o, ts_get_attr_int(node, "metallic", o->ob.metallic)); + + return o; + +err: + csg_free_object(o); + while(olist) { + o = olist; + olist = olist->ob.next; + csg_free_object(o); + } + return 0; +}