diff options
-rw-r--r-- | libdimension/cone.c | 113 | ||||
-rw-r--r-- | libdimension/csg.c | 53 | ||||
-rw-r--r-- | libdimension/dimension/object.h | 18 | ||||
-rw-r--r-- | libdimension/object.c | 24 | ||||
-rw-r--r-- | libdimension/plane.c | 40 | ||||
-rw-r--r-- | libdimension/torus.c | 59 | ||||
-rw-r--r-- | libdimension/triangle.c | 40 |
7 files changed, 191 insertions, 156 deletions
diff --git a/libdimension/cone.c b/libdimension/cone.c index a2d2d55..fe01e85 100644 --- a/libdimension/cone.c +++ b/libdimension/cone.c @@ -26,18 +26,19 @@ #include "dimension.h" #include <math.h> -/** Cone payload type. */ -typedef struct dmnsn_cone_payload { +/** Cone type. */ +typedef struct dmnsn_cone { + dmnsn_object object; double r1, r2; -} dmnsn_cone_payload; +} dmnsn_cone; /** Intersection callback for a cone. */ static bool -dmnsn_cone_intersection_fn(const dmnsn_object *cone, dmnsn_line l, +dmnsn_cone_intersection_fn(const dmnsn_object *object, dmnsn_line l, dmnsn_intersection *intersection) { - const dmnsn_cone_payload *payload = cone->ptr; - double r1 = payload->r1, r2 = payload->r2; + const dmnsn_cone *cone = (const dmnsn_cone *)object; + double r1 = cone->r1, r2 = cone->r2; /* Solve (x0 + nx*t)^2 + (z0 + nz*t)^2 == (((r2 - r1)*(y0 + ny*t) + r1 + r2)/2)^2 */ @@ -79,22 +80,29 @@ dmnsn_cone_intersection_fn(const dmnsn_object *cone, dmnsn_line l, /** Inside callback for a cone. */ static bool -dmnsn_cone_inside_fn(const dmnsn_object *cone, dmnsn_vector point) +dmnsn_cone_inside_fn(const dmnsn_object *object, dmnsn_vector point) { - const dmnsn_cone_payload *payload = cone->ptr; - double r1 = payload->r1, r2 = payload->r2; + const dmnsn_cone *cone = (const dmnsn_cone *)cone; + double r1 = cone->r1, r2 = cone->r2; double r = (point.y*(r2 - r1) + r1 + r2)/2.0; return point.x*point.x + point.z*point.z < r*r && point.y > -1.0 && point.y < 1.0; } +/** Cone cap type. */ +typedef struct dmnsn_cone_cap { + dmnsn_object object; + double r; +} dmnsn_cone_cap; + /** Cone cap intersection function. */ static bool -dmnsn_cone_cap_intersection_fn(const dmnsn_object *cap, dmnsn_line l, +dmnsn_cone_cap_intersection_fn(const dmnsn_object *object, dmnsn_line l, dmnsn_intersection *intersection) { if (l.n.y != 0.0) { - double *rptr = cap->ptr, r = *rptr; + const dmnsn_cone_cap *cap = (const dmnsn_cone_cap *)object; + double r = cap->r; double t = -l.x0.y/l.n.y; dmnsn_vector p = dmnsn_line_point(l, t); if (t >= 0.0 && p.x*p.x + p.z*p.z <= r*r) { @@ -109,7 +117,7 @@ dmnsn_cone_cap_intersection_fn(const dmnsn_object *cap, dmnsn_line l, /** Inside callback for a cone cap. */ static bool -dmnsn_cone_cap_inside_fn(const dmnsn_object *cone, dmnsn_vector point) +dmnsn_cone_cap_inside_fn(const dmnsn_object *object, dmnsn_vector point) { return false; } @@ -118,57 +126,52 @@ dmnsn_cone_cap_inside_fn(const dmnsn_object *cone, dmnsn_vector point) dmnsn_object * dmnsn_new_cone_cap(double r) { - dmnsn_object *cap = dmnsn_new_object(); - cap->intersection_fn = dmnsn_cone_cap_intersection_fn; - cap->inside_fn = dmnsn_cone_cap_inside_fn; - cap->bounding_box.min = dmnsn_new_vector(-r, 0.0, -r); - cap->bounding_box.max = dmnsn_new_vector(+r, 0.0, +r); - - double *payload = DMNSN_MALLOC(double); - *payload = r; - cap->ptr = payload; - cap->free_fn = dmnsn_free; - - return cap; + dmnsn_cone_cap *cap = DMNSN_MALLOC(dmnsn_cone_cap); + dmnsn_init_object(&cap->object); + cap->object.intersection_fn = dmnsn_cone_cap_intersection_fn; + cap->object.inside_fn = dmnsn_cone_cap_inside_fn; + cap->object.bounding_box.min = dmnsn_new_vector(-r, 0.0, -r); + cap->object.bounding_box.max = dmnsn_new_vector(+r, 0.0, +r); + cap->r = r; + return &cap->object; } /* Allocate a new cone object */ dmnsn_object * dmnsn_new_cone(double r1, double r2, bool open) { - dmnsn_object *cone = dmnsn_new_object(); - cone->intersection_fn = dmnsn_cone_intersection_fn; - cone->inside_fn = dmnsn_cone_inside_fn; + dmnsn_cone *cone = DMNSN_MALLOC(dmnsn_cone); + dmnsn_init_object(&cone->object); + cone->object.intersection_fn = dmnsn_cone_intersection_fn; + cone->object.inside_fn = dmnsn_cone_inside_fn; double rmax = dmnsn_max(r1, r2); - cone->bounding_box.min = dmnsn_new_vector(-rmax, -1.0, -rmax); - cone->bounding_box.max = dmnsn_new_vector(rmax, 1.0, rmax); - - dmnsn_cone_payload *payload = DMNSN_MALLOC(dmnsn_cone_payload); - payload->r1 = r1; - payload->r2 = r2; - cone->ptr = payload; - cone->free_fn = dmnsn_free; + cone->object.bounding_box.min = dmnsn_new_vector(-rmax, -1.0, -rmax); + cone->object.bounding_box.max = dmnsn_new_vector(rmax, 1.0, rmax); + cone->r1 = r1; + cone->r2 = r2; - /* Implement closed cones as a union with the caps */ - if (!open) { - dmnsn_object *cap1 = dmnsn_new_cone_cap(r1); - dmnsn_object *cap2 = dmnsn_new_cone_cap(r2); - cap1->intrinsic_trans = dmnsn_translation_matrix( - dmnsn_new_vector(0.0, -1.0, 0.0) - ); - cap2->intrinsic_trans = dmnsn_translation_matrix( - dmnsn_new_vector(0.0, +1.0, 0.0) - ); - /* Flip the normal around for the top cap */ - cap2->intrinsic_trans.n[1][1] = -1.0; - - dmnsn_array *withcaps = dmnsn_new_array(sizeof(dmnsn_object *)); - dmnsn_array_push(withcaps, &cone); - dmnsn_array_push(withcaps, &cap1); - dmnsn_array_push(withcaps, &cap2); - cone = dmnsn_new_csg_union(withcaps); - dmnsn_delete_array(withcaps); + if (open) { + return &cone->object; } - return cone; + /* Implement closed cones as a union with the caps */ + dmnsn_object *cap1 = dmnsn_new_cone_cap(r1); + dmnsn_object *cap2 = dmnsn_new_cone_cap(r2); + cap1->intrinsic_trans = dmnsn_translation_matrix( + dmnsn_new_vector(0.0, -1.0, 0.0) + ); + cap2->intrinsic_trans = dmnsn_translation_matrix( + dmnsn_new_vector(0.0, +1.0, 0.0) + ); + /* Flip the normal around for the top cap */ + cap2->intrinsic_trans.n[1][1] = -1.0; + + dmnsn_array *withcaps = dmnsn_new_array(sizeof(dmnsn_object *)); + dmnsn_array_push(withcaps, &cone); + dmnsn_array_push(withcaps, &cap1); + dmnsn_array_push(withcaps, &cap2); + dmnsn_object *cone_cap_union = dmnsn_new_csg_union(withcaps); + dmnsn_delete_array(withcaps); + + return cone_cap_union; } diff --git a/libdimension/csg.c b/libdimension/csg.c index 2595f7d..b364e27 100644 --- a/libdimension/csg.c +++ b/libdimension/csg.c @@ -1,5 +1,5 @@ /************************************************************************* - * Copyright (C) 2010-2012 Tavian Barnes <tavianator@tavianator.com> * + * Copyright (C) 2010-2014 Tavian Barnes <tavianator@tavianator.com> * * * * This file is part of The Dimension Library. * * * @@ -30,59 +30,68 @@ * Unions */ +typedef struct { + dmnsn_object object; + dmnsn_bvh *bvh; +} dmnsn_csg_union; + /** CSG union intersection callback. */ static bool -dmnsn_csg_union_intersection_fn(const dmnsn_object *csg, +dmnsn_csg_union_intersection_fn(const dmnsn_object *object, dmnsn_line line, dmnsn_intersection *intersection) { - dmnsn_bvh *bvh = csg->ptr; + dmnsn_bvh *bvh = ((const dmnsn_csg_union *)object)->bvh; return dmnsn_bvh_intersection(bvh, line, intersection, true); } /** CSG union inside callback. */ static bool -dmnsn_csg_union_inside_fn(const dmnsn_object *csg, dmnsn_vector point) +dmnsn_csg_union_inside_fn(const dmnsn_object *object, dmnsn_vector point) { - dmnsn_bvh *bvh = csg->ptr; + dmnsn_bvh *bvh = ((const dmnsn_csg_union *)object)->bvh; return dmnsn_bvh_inside(bvh, point); } /** CSG union initialization callback. */ static void -dmnsn_csg_union_initialize_fn(dmnsn_object *csg) +dmnsn_csg_union_initialize_fn(dmnsn_object *object) { - csg->trans = dmnsn_identity_matrix(); + dmnsn_csg_union *csg = (dmnsn_csg_union *)object; + csg->object.trans = dmnsn_identity_matrix(); - dmnsn_bvh *bvh = dmnsn_new_bvh(csg->children, DMNSN_BVH_PRTREE); - csg->ptr = bvh; - csg->bounding_box = dmnsn_bvh_bounding_box(bvh); + dmnsn_bvh *bvh = dmnsn_new_bvh(csg->object.children, DMNSN_BVH_PRTREE); + csg->bvh = bvh; + csg->object.bounding_box = dmnsn_bvh_bounding_box(bvh); } /** CSG union destruction callback. */ static void -dmnsn_csg_union_free_fn(void *ptr) +dmnsn_csg_union_free_fn(dmnsn_object *object) { - dmnsn_delete_bvh(ptr); + dmnsn_csg_union *csg = (dmnsn_csg_union *)object; + dmnsn_delete_bvh(csg->bvh); + dmnsn_free(csg); } /* Bulk-load a union */ dmnsn_object * dmnsn_new_csg_union(const dmnsn_array *objects) { - dmnsn_object *csg = dmnsn_new_object(); + dmnsn_csg_union *csg = DMNSN_MALLOC(dmnsn_csg_union); + dmnsn_init_object(&csg->object); DMNSN_ARRAY_FOREACH (dmnsn_object **, object, objects) { - dmnsn_array_push(csg->children, object); + dmnsn_array_push(csg->object.children, object); } - csg->split_children = true; - csg->ptr = NULL; - csg->intersection_fn = dmnsn_csg_union_intersection_fn; - csg->inside_fn = dmnsn_csg_union_inside_fn; - csg->initialize_fn = dmnsn_csg_union_initialize_fn; - csg->free_fn = dmnsn_csg_union_free_fn; - - return csg; + csg->object.split_children = true; + csg->object.intersection_fn = dmnsn_csg_union_intersection_fn; + csg->object.inside_fn = dmnsn_csg_union_inside_fn; + csg->object.initialize_fn = dmnsn_csg_union_initialize_fn; + csg->object.free_fn = dmnsn_csg_union_free_fn; + csg->bvh = NULL; + + return &csg->object; } /** diff --git a/libdimension/dimension/object.h b/libdimension/dimension/object.h index 28cc266..4d75582 100644 --- a/libdimension/dimension/object.h +++ b/libdimension/dimension/object.h @@ -1,5 +1,5 @@ /************************************************************************* - * Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.com> * + * Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> * * * * This file is part of The Dimension Library. * * * @@ -67,6 +67,12 @@ typedef bool dmnsn_object_intersection_fn(const dmnsn_object *object, typedef bool dmnsn_object_inside_fn(const dmnsn_object *object, dmnsn_vector point); +/** + * Object destruction callback. + * @param[in] object The object to delete. + */ +typedef void dmnsn_object_free_fn(dmnsn_object *object); + /** An object. */ struct dmnsn_object { dmnsn_texture *texture; /**< Surface properties. */ @@ -85,9 +91,7 @@ struct dmnsn_object { dmnsn_object_initialize_fn *initialize_fn; /**< Initialization callback. */ dmnsn_object_intersection_fn *intersection_fn; /**< Intersection callback. */ dmnsn_object_inside_fn *inside_fn; /**< Inside callback. */ - dmnsn_free_fn *free_fn; /**< Destruction callback. */ - - void *ptr; /**< Generic pointer for object info. */ + dmnsn_object_free_fn *free_fn; /**< Destruction callback. */ DMNSN_REFCOUNT; /**< Reference count. */ bool initialized; /**< @internal Whether the object is initialized yet. */ @@ -100,6 +104,12 @@ struct dmnsn_object { dmnsn_object *dmnsn_new_object(void); /** + * Initialize a dmnsn_object field. + * @param[in,out] object The object to initialize. + */ +void dmnsn_init_object(dmnsn_object *object); + +/** * Free an object * @param[in,out] object The object to destroy. */ diff --git a/libdimension/object.c b/libdimension/object.c index b085cff..52b9558 100644 --- a/libdimension/object.c +++ b/libdimension/object.c @@ -26,11 +26,25 @@ #include "dimension-internal.h" #include <stdlib.h> +static void +dmnsn_default_object_free_fn(dmnsn_object *object) +{ + dmnsn_free(object); +} + /* Allocate a dummy object */ dmnsn_object * dmnsn_new_object(void) { dmnsn_object *object = DMNSN_MALLOC(dmnsn_object); + dmnsn_init_object(object); + return object; +} + +/* Initialize a dmnsn_object field */ +void +dmnsn_init_object(dmnsn_object *object) +{ object->texture = NULL; object->interior = NULL; object->trans = dmnsn_identity_matrix(); @@ -40,13 +54,12 @@ dmnsn_new_object(void) object->intersection_fn = NULL; object->inside_fn = NULL; object->initialize_fn = NULL; - object->free_fn = NULL; + object->free_fn = dmnsn_default_object_free_fn; object->initialized = false; DMNSN_REFCOUNT_INIT(object); - return object; } -/* Free a dummy object */ +/* Free a dmnsn_object */ void dmnsn_delete_object(dmnsn_object *object) { @@ -57,10 +70,7 @@ dmnsn_delete_object(dmnsn_object *object) dmnsn_delete_array(object->children); dmnsn_delete_interior(object->interior); dmnsn_delete_texture(object->texture); - if (object->free_fn) { - object->free_fn(object->ptr); - } - dmnsn_free(object); + object->free_fn(object); } } diff --git a/libdimension/plane.c b/libdimension/plane.c index 33d2737..dc7fc1a 100644 --- a/libdimension/plane.c +++ b/libdimension/plane.c @@ -27,6 +27,12 @@ #include <math.h> #include <stdlib.h> +/** Plane type. */ +typedef struct { + dmnsn_object object; + dmnsn_vector normal; +} dmnsn_plane; + /* Plane object callbacks */ static bool dmnsn_plane_intersection_fn(const dmnsn_object *plane, @@ -39,32 +45,30 @@ static bool dmnsn_plane_inside_fn(const dmnsn_object *plane, dmnsn_object * dmnsn_new_plane(dmnsn_vector normal) { - dmnsn_object *plane = dmnsn_new_object(); - - dmnsn_vector *param = DMNSN_MALLOC(dmnsn_vector); - *param = normal; + dmnsn_plane *plane = DMNSN_MALLOC(dmnsn_plane); + dmnsn_init_object(&plane->object); - plane->intersection_fn = dmnsn_plane_intersection_fn; - plane->inside_fn = dmnsn_plane_inside_fn; - plane->free_fn = dmnsn_free; - plane->bounding_box = dmnsn_infinite_bounding_box(); - plane->ptr = param; - return plane; + plane->object.intersection_fn = dmnsn_plane_intersection_fn; + plane->object.inside_fn = dmnsn_plane_inside_fn; + plane->object.bounding_box = dmnsn_infinite_bounding_box(); + plane->normal = normal; + return &plane->object; } /* Returns the closest intersection of `line' with `plane' */ static bool -dmnsn_plane_intersection_fn(const dmnsn_object *plane, dmnsn_line line, +dmnsn_plane_intersection_fn(const dmnsn_object *object, dmnsn_line line, dmnsn_intersection *intersection) { - dmnsn_vector *normal = plane->ptr; + const dmnsn_plane *plane = (const dmnsn_plane *)object; + dmnsn_vector normal = plane->normal; - double den = dmnsn_vector_dot(line.n, *normal); + double den = dmnsn_vector_dot(line.n, normal); if (den != 0.0) { - double t = -dmnsn_vector_dot(line.x0, *normal)/den; + double t = -dmnsn_vector_dot(line.x0, normal)/den; if (t >= 0.0) { intersection->t = t; - intersection->normal = *normal; + intersection->normal = normal; return true; } } @@ -73,8 +77,8 @@ dmnsn_plane_intersection_fn(const dmnsn_object *plane, dmnsn_line line, /* Return whether a point is inside a plane */ static bool -dmnsn_plane_inside_fn(const dmnsn_object *plane, dmnsn_vector point) +dmnsn_plane_inside_fn(const dmnsn_object *object, dmnsn_vector point) { - dmnsn_vector *normal = plane->ptr; - return dmnsn_vector_dot(point, *normal) < 0.0; + const dmnsn_plane *plane = (const dmnsn_plane *)object; + return dmnsn_vector_dot(point, plane->normal) < 0.0; } diff --git a/libdimension/torus.c b/libdimension/torus.c index 67bed0f..53e8fcb 100644 --- a/libdimension/torus.c +++ b/libdimension/torus.c @@ -25,16 +25,17 @@ #include "dimension.h" -/** Torus payload type. */ -typedef struct dmnsn_torus_payload { +/** Torus type. */ +typedef struct { + dmnsn_object object; double major, minor; -} dmnsn_torus_payload; +} dmnsn_torus; /** Bound the torus in a cylindrical shell. */ static inline bool -dmnsn_torus_bound_intersection(const dmnsn_torus_payload *payload, dmnsn_line l) +dmnsn_torus_bound_intersection(const dmnsn_torus *torus, dmnsn_line l) { - double R = payload->major, r = payload->minor; + double R = torus->major, r = torus->minor; double rmax = R + r, rmin = R - r; double rmax2 = rmax*rmax, rmin2 = rmin*rmin; @@ -77,15 +78,16 @@ dmnsn_torus_bound_intersection(const dmnsn_torus_payload *payload, dmnsn_line l) /** Torus intersection callback. */ static bool -dmnsn_torus_intersection_fn(const dmnsn_object *torus, dmnsn_line l, +dmnsn_torus_intersection_fn(const dmnsn_object *object, dmnsn_line l, dmnsn_intersection *intersection) { - const dmnsn_torus_payload *payload = torus->ptr; - double R = payload->major, r = payload->minor; + const dmnsn_torus *torus = (const dmnsn_torus *)object; + double R = torus->major, r = torus->minor; double R2 = R*R, r2 = r*r; - if (!dmnsn_torus_bound_intersection(payload, l)) + if (!dmnsn_torus_bound_intersection(torus, l)) { return false; + } /* This bit of algebra here is correct */ dmnsn_vector x0mod = dmnsn_new_vector(l.x0.x, -l.x0.y, l.x0.z); @@ -119,7 +121,7 @@ dmnsn_torus_intersection_fn(const dmnsn_object *torus, dmnsn_line l, dmnsn_vector p = dmnsn_line_point(l, t); dmnsn_vector center = dmnsn_vector_mul( - payload->major, + R, dmnsn_vector_normalized(dmnsn_new_vector(p.x, 0.0, p.z)) ); dmnsn_vector normal = dmnsn_vector_sub(p, center); @@ -131,31 +133,28 @@ dmnsn_torus_intersection_fn(const dmnsn_object *torus, dmnsn_line l, /** Torus inside callback. */ static bool -dmnsn_torus_inside_fn(const dmnsn_object *torus, dmnsn_vector point) +dmnsn_torus_inside_fn(const dmnsn_object *object, dmnsn_vector point) { - const dmnsn_torus_payload *payload = torus->ptr; - double dmajor = payload->major - sqrt(point.x*point.x + point.z*point.z); - return dmajor*dmajor + point.y*point.y < payload->minor*payload->minor; + const dmnsn_torus *torus = (const dmnsn_torus *)object; + double dmajor = torus->major - sqrt(point.x*point.x + point.z*point.z); + return dmajor*dmajor + point.y*point.y < torus->minor*torus->minor; } /* Allocate a new torus */ dmnsn_object * dmnsn_new_torus(double major, double minor) { - dmnsn_object *torus = dmnsn_new_object(); - torus->intersection_fn = dmnsn_torus_intersection_fn; - torus->inside_fn = dmnsn_torus_inside_fn; - torus->bounding_box.min = dmnsn_new_vector(-(major + minor), - -minor, - -(major + minor)); - torus->bounding_box.max = dmnsn_new_vector(major + minor, - minor, - major + minor); - - dmnsn_torus_payload *payload = DMNSN_MALLOC(dmnsn_torus_payload); - payload->major = major; - payload->minor = minor; - torus->ptr = payload; - torus->free_fn = dmnsn_free; - return torus; + dmnsn_torus *torus = DMNSN_MALLOC(dmnsn_torus); + dmnsn_init_object(&torus->object); + torus->object.intersection_fn = dmnsn_torus_intersection_fn; + torus->object.inside_fn = dmnsn_torus_inside_fn; + torus->object.bounding_box.min = dmnsn_new_vector( + -(major + minor), -minor, -(major + minor) + ); + torus->object.bounding_box.max = dmnsn_new_vector( + major + minor, minor, major + minor + ); + torus->major = major; + torus->minor = minor; + return &torus->object; } diff --git a/libdimension/triangle.c b/libdimension/triangle.c index 0e6daf4..9ddc3fc 100644 --- a/libdimension/triangle.c +++ b/libdimension/triangle.c @@ -25,16 +25,18 @@ #include "dimension.h" -typedef struct dmnsn_triangle_payload { +/** Triangle type. */ +typedef struct { + dmnsn_object object; dmnsn_vector na, nab, nac; -} dmnsn_triangle_payload; +} dmnsn_triangle; /** Triangle intersection callback. */ static bool -dmnsn_triangle_intersection_fn(const dmnsn_object *triangle, dmnsn_line l, +dmnsn_triangle_intersection_fn(const dmnsn_object *object, dmnsn_line l, dmnsn_intersection *intersection) { - const dmnsn_triangle_payload *payload = triangle->ptr; + const dmnsn_triangle *triangle = (const dmnsn_triangle *)object; /* See the change of basis in dmnsn_new_triangle() */ double t = -l.x0.z/l.n.z; @@ -43,10 +45,10 @@ dmnsn_triangle_intersection_fn(const dmnsn_object *triangle, dmnsn_line l, if (t >= 0.0 && u >= 0.0 && v >= 0.0 && u + v <= 1.0) { intersection->t = t; intersection->normal = dmnsn_vector_add( - payload->na, + triangle->na, dmnsn_vector_add( - dmnsn_vector_mul(u, payload->nab), - dmnsn_vector_mul(v, payload->nac) + dmnsn_vector_mul(u, triangle->nab), + dmnsn_vector_mul(v, triangle->nac) ) ); return true; @@ -71,18 +73,16 @@ dmnsn_new_triangle(dmnsn_vector a, dmnsn_vector b, dmnsn_vector c, nb = dmnsn_vector_normalized(nb); nc = dmnsn_vector_normalized(nc); - dmnsn_triangle_payload *payload = DMNSN_MALLOC(dmnsn_triangle_payload); - payload->na = na; - payload->nab = dmnsn_vector_sub(nb, na); - payload->nac = dmnsn_vector_sub(nc, na); + dmnsn_triangle *triangle = DMNSN_MALLOC(dmnsn_triangle); + triangle->na = na; + triangle->nab = dmnsn_vector_sub(nb, na); + triangle->nac = dmnsn_vector_sub(nc, na); - dmnsn_object *triangle = dmnsn_new_object(); - triangle->ptr = payload; - triangle->intersection_fn = dmnsn_triangle_intersection_fn; - triangle->inside_fn = dmnsn_triangle_inside_fn; - triangle->free_fn = dmnsn_free; - triangle->bounding_box.min = dmnsn_zero; - triangle->bounding_box.max = dmnsn_new_vector(1.0, 1.0, 0.0); + dmnsn_init_object(&triangle->object); + triangle->object.intersection_fn = dmnsn_triangle_intersection_fn; + triangle->object.inside_fn = dmnsn_triangle_inside_fn; + triangle->object.bounding_box.min = dmnsn_zero; + triangle->object.bounding_box.max = dmnsn_new_vector(1.0, 1.0, 0.0); /* * Make a change-of-basis matrix @@ -93,9 +93,9 @@ dmnsn_new_triangle(dmnsn_vector a, dmnsn_vector b, dmnsn_vector c, dmnsn_vector ab = dmnsn_vector_sub(b, a); dmnsn_vector ac = dmnsn_vector_sub(c, a); dmnsn_vector normal = dmnsn_vector_cross(ab, ac); - triangle->intrinsic_trans = dmnsn_new_matrix4(ab, ac, normal, a); + triangle->object.intrinsic_trans = dmnsn_new_matrix4(ab, ac, normal, a); - return triangle; + return &triangle->object; } /* Allocate a new flat triangle */ |