star-2d

Contour structuring for efficient 2D geometric queries
git clone git://git.meso-star.fr/star-2d.git
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commit 7901a05be4507db4a7260e45e5467720d39ceee0
parent fe052cd51bcfc28b62bd26ae3bf7d3c242efeb83
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Mon, 20 Jun 2016 16:09:00 +0200

Test the s2d_shape API

Diffstat:
Mcmake/CMakeLists.txt | 1+
Msrc/s2d.h | 10+++++-----
Msrc/s2d_line_segments.c | 9++++++---
Msrc/s2d_shape.c | 14+++++++++++---
Asrc/test_s2d_shape.c | 282+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Msrc/test_s2d_utils.h | 49+++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 354 insertions(+), 11 deletions(-)

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt @@ -122,6 +122,7 @@ if(NOT NO_TEST) endfunction() new_test(test_s2d_device) + new_test(test_s2d_shape) endif(NOT NO_TEST) ################################################################################ diff --git a/src/s2d.h b/src/s2d.h @@ -329,7 +329,7 @@ s2d_shape_ref_put * representation of the caller with a simple dynamic array */ S2D_API res_T s2d_shape_get_id - (struct s2d_shape* shape, + (const struct s2d_shape* shape, unsigned* id); /* Enable/disable the shape, i.e. it cannot be hit when its associated scene is @@ -343,13 +343,13 @@ s2d_shape_enable * Default is 1 */ S2D_API res_T s2d_shape_is_enabled - (struct s2d_shape* shape, + (const struct s2d_shape* shape, char* is_enabled); /* Define whether the shape is attached or not */ S2D_API res_T s2d_shape_is_attached - (struct s2d_shape* shape, + (const struct s2d_shape* shape, char* is_attached); /* Flip the contour orientation, i.e. flip the normal of the contour */ @@ -423,8 +423,8 @@ s2d_line_segments_get_segments_count S2D_API res_T s2d_line_segments_get_segment_indices (const struct s2d_shape* shape, - const unsigned itri, - unsigned ids[3]); + const unsigned isegment, + unsigned ids[2]); /* Define a intersection filter function. The filter function is invoked at * each intersection found during the s2d_scene_trace_ray calls. If func does diff --git a/src/s2d_line_segments.c b/src/s2d_line_segments.c @@ -132,7 +132,7 @@ line_setup_positions positions = darray_float_data_get(&line->attribs[S2D_POSITION]->data); if(attr->type == S2D_FLOAT2) { FOR_EACH(ivert, 0, nverts) { - attr->get(ivert, positions + ivert*3, data); + attr->get(ivert, positions + ivert*2/*# coords per vertex*/, data); } } else { FOR_EACH(ivert, 0, nverts) { @@ -412,7 +412,7 @@ line_segments_setup_indexed_vertices res_T res = RES_OK; ASSERT(line); - if(nsegments || nverts || !attribs || !nattribs) { + if(!nsegments || !nverts || !attribs || !nattribs) { res = RES_BAD_ARG; goto error; } @@ -435,7 +435,10 @@ line_segments_setup_indexed_vertices iattr = 0; has_position = 0; FOR_EACH(iattr, 0, nattribs) { - ASSERT((unsigned)attribs[iattr].usage < S2D_ATTRIBS_COUNT__); + if((unsigned)attribs[iattr].usage >= S2D_ATTRIBS_COUNT__) { + res = RES_BAD_ARG; + goto error; + } if(attribs[iattr].get == S2D_KEEP) { const enum s2d_attrib_usage attr_usage = attribs[iattr].usage; const enum s2d_type type = attribs[iattr].type; diff --git a/src/s2d_shape.c b/src/s2d_shape.c @@ -112,7 +112,7 @@ s2d_shape_ref_put(struct s2d_shape* shape) } res_T -s2d_shape_get_id(struct s2d_shape* shape, unsigned* id) +s2d_shape_get_id(const struct s2d_shape* shape, unsigned* id) { if(!shape || !id) return RES_BAD_ARG; *id = shape->id.index; @@ -124,11 +124,11 @@ s2d_shape_enable(struct s2d_shape* shape, const char enable) { if(!shape) return RES_BAD_ARG; shape->is_enabled = enable; - return RES_BAD_ARG; + return RES_OK; } res_T -s2d_shape_is_enabled(struct s2d_shape* shape, char* is_enabled) +s2d_shape_is_enabled(const struct s2d_shape* shape, char* is_enabled) { if(!shape || !is_enabled) return RES_BAD_ARG; *is_enabled = shape->is_enabled; @@ -136,6 +136,14 @@ s2d_shape_is_enabled(struct s2d_shape* shape, char* is_enabled) } res_T +s2d_shape_is_attached(const struct s2d_shape* shape, char* is_attached) +{ + if(!shape || !is_attached) return RES_BAD_ARG; + *is_attached = !is_list_empty(&shape->scene_attachment); + return RES_OK; +} + +res_T s2d_shape_flip_contour(struct s2d_shape* shape) { if(!shape) return RES_BAD_ARG; diff --git a/src/test_s2d_shape.c b/src/test_s2d_shape.c @@ -0,0 +1,282 @@ +/* Copyright (C) |Meso|Star> 2016 (contact@meso-star.com) + * + * This software is governed by the CeCILL license under French law and + * abiding by the rules of distribution of free software. You can use, + * modify and/or redistribute the software under the terms of the CeCILL + * license as circulated by CEA, CNRS and INRIA at the following URL + * "http://www.cecill.info". + * + * As a counterpart to the access to the source code and rights to copy, + * modify and redistribute granted by the license, users are provided only + * with a limited warranty and the software's author, the holder of the + * economic rights, and the successive licensors have only limited + * liability. + * + * In this respect, the user's attention is drawn to the risks associated + * with loading, using, modifying and/or developing or reproducing the + * software by the user in light of its specific status of free software, + * that may mean that it is complicated to manipulate, and that also + * therefore means that it is reserved for developers and experienced + * professionals having in-depth computer knowledge. Users are therefore + * encouraged to load and test the software's suitability as regards their + * requirements in conditions enabling the security of their systems and/or + * data to be ensured and, more generally, to use and operate it in the + * same conditions as regards security. + * + * The fact that you are presently reading this means that you have had + * knowledge of the CeCILL license and that you accept its terms. */ + +#include "s2d.h" +#include "test_s2d_utils.h" + +#include <rsys/float2.h> + +static int +filter_none + (const struct s2d_hit* hit, + const float org[3], + const float dir[3], + void* ray_data, + void* filter_data) +{ + (void)hit, (void)org, (void)dir, (void)ray_data, (void)filter_data; + return 0; +} + +int +main(int argc, char** argv) +{ + struct mem_allocator allocator; + struct s2d_device* dev; + struct s2d_shape* shape; + struct s2d_shape* shape_copy; + struct s2d_vertex_data vdata[4]; + struct s2d_attrib attr; + const unsigned nsegs = sizeof(box_ids) / sizeof(unsigned[2]); + const unsigned nverts = sizeof(box_verts) / sizeof(float[2]); + unsigned n; + unsigned ids[2]; + unsigned id; + void* data = (void*)&box_desc; + char c; + (void)argc, (void)argv; + + mem_init_proxy_allocator(&allocator, &mem_default_allocator); + + CHECK(s2d_device_create(NULL, &allocator, 0, &dev), RES_OK); + + CHECK(s2d_shape_create_line_segments(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_shape_create_line_segments(dev, NULL), RES_BAD_ARG); + CHECK(s2d_shape_create_line_segments(NULL, &shape), RES_BAD_ARG); + CHECK(s2d_shape_create_line_segments(dev, &shape), RES_OK); + + CHECK(s2d_shape_ref_get(NULL), RES_BAD_ARG); + CHECK(s2d_shape_ref_get(shape), RES_OK); + CHECK(s2d_shape_ref_put(NULL), RES_BAD_ARG); + CHECK(s2d_shape_ref_put(shape), RES_OK); + CHECK(s2d_shape_ref_put(shape), RES_OK); + + CHECK(s2d_shape_create_line_segments(dev, &shape), RES_OK); + + CHECK(s2d_shape_get_id(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_shape_get_id(shape, NULL), RES_BAD_ARG); + CHECK(s2d_shape_get_id(NULL, &id), RES_BAD_ARG); + CHECK(s2d_shape_get_id(shape, &id), RES_OK); + NCHECK(id, S2D_INVALID_ID); + + CHECK(s2d_shape_is_attached(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_shape_is_attached(shape, NULL), RES_BAD_ARG); + CHECK(s2d_shape_is_attached(NULL, &c), RES_BAD_ARG); + CHECK(s2d_shape_is_attached(shape, &c), RES_OK); + CHECK(c, 0); + + vdata[0].type = S2D_FLOAT2; + vdata[0].usage = S2D_POSITION; + vdata[0].get = box_get_position; + + #define SETUP s2d_line_segments_setup_indexed_vertices + CHECK(SETUP(NULL, 0, NULL, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, 0, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, NULL, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, 0, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, vdata, 0, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, 0, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, NULL, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, 0, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, NULL, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, NULL, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, NULL, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, NULL, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, 0, box_get_ids, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, 0, box_get_ids, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(NULL, nsegs, box_get_ids, nverts, vdata, 1, data), RES_BAD_ARG); + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, vdata, 1, data), RES_OK); + + vdata[0] = S2D_VERTEX_DATA_NULL; + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, vdata, 1, data), RES_BAD_ARG); + + vdata[0].type = S2D_FLOAT2; + vdata[0].usage = S2D_POSITION; + vdata[0].get = S2D_KEEP; + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, vdata, 1, data), RES_OK); + + vdata[0].get = box_get_position; + CHECK(SETUP(shape, nsegs, box_get_ids, nverts, vdata, 1, data), RES_OK); + #undef SETUP + + CHECK(s2d_line_segments_get_vertices_count(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_vertices_count(shape, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_vertices_count(NULL, &n), RES_BAD_ARG); + CHECK(s2d_line_segments_get_vertices_count(shape, &n), RES_OK); + CHECK(n, nverts); + + CHECK(s2d_line_segments_get_segments_count(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segments_count(shape, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segments_count(NULL, &n), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segments_count(shape, &n), RES_OK); + CHECK(n, nsegs); + + #define GET_ATTR s2d_line_segments_get_vertex_attrib + CHECK(GET_ATTR(NULL, nverts, S2D_ATTRIBS_COUNT__, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(shape, nverts, S2D_ATTRIBS_COUNT__, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, 0, S2D_ATTRIBS_COUNT__, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(shape, 0, S2D_ATTRIBS_COUNT__, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, nverts, S2D_POSITION, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(shape, nverts, S2D_POSITION, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, 0, S2D_POSITION, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(shape, 0, S2D_POSITION, NULL), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, nverts, S2D_ATTRIBS_COUNT__, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(shape, nverts, S2D_ATTRIBS_COUNT__, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, 0, S2D_ATTRIBS_COUNT__, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(shape, 0, S2D_ATTRIBS_COUNT__, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, nverts, S2D_POSITION, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(shape, nverts, S2D_POSITION, &attr), RES_BAD_ARG); + CHECK(GET_ATTR(NULL, 0, S2D_POSITION, &attr), RES_BAD_ARG); + + FOR_EACH(id, 0, nverts) { + float pos[2]; + box_get_position(id, pos, data); + CHECK(GET_ATTR(shape, id, S2D_POSITION, &attr), RES_OK); + CHECK(attr.type, S2D_FLOAT2); + CHECK(attr.usage, S2D_POSITION); + CHECK(f2_eq_eps(attr.value, pos, 1.e-6f), 1); + } + #undef GET_ATTR + + CHECK(s2d_line_segments_get_segment_indices(NULL, nsegs, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(shape, nsegs, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(NULL, nsegs, ids), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(shape, nsegs, ids), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(NULL, 0, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(shape, 0, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_get_segment_indices(NULL, 0, ids), RES_BAD_ARG); + + FOR_EACH(id, 0, nsegs) { + unsigned indices[2]; + box_get_ids(id, indices, data); + CHECK(s2d_line_segments_get_segment_indices(shape, id, ids), RES_OK); + CHECK(ids[0], indices[0]); + CHECK(ids[1], indices[1]); + } + + CHECK(s2d_shape_is_enabled(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_shape_is_enabled(shape, NULL), RES_BAD_ARG); + CHECK(s2d_shape_is_enabled(NULL, &c), RES_BAD_ARG); + CHECK(s2d_shape_is_enabled(shape, &c), RES_OK); + NCHECK(c, 0); + + CHECK(s2d_shape_enable(NULL, 0), RES_BAD_ARG); + CHECK(s2d_shape_enable(shape, 0), RES_OK); + CHECK(s2d_shape_is_enabled(shape, &c), RES_OK); + CHECK(c, 0); + + CHECK(s2d_shape_flip_contour(NULL), RES_BAD_ARG); + CHECK(s2d_shape_flip_contour(shape), RES_OK); + CHECK(s2d_shape_flip_contour(shape), RES_OK); + + #define SET_FILTER_FUNC s2d_line_segments_set_hit_filter_function + #define GET_FILTER_DATA s2d_line_segments_get_hit_filter_data + CHECK(SET_FILTER_FUNC(NULL, NULL, NULL), RES_BAD_ARG); + CHECK(SET_FILTER_FUNC(shape, NULL, NULL), RES_OK); + CHECK(SET_FILTER_FUNC(NULL, filter_none, NULL), RES_BAD_ARG); + CHECK(SET_FILTER_FUNC(shape, filter_none, NULL), RES_OK); + + CHECK(GET_FILTER_DATA(NULL, NULL), RES_BAD_ARG); + CHECK(GET_FILTER_DATA(shape, NULL), RES_BAD_ARG); + CHECK(GET_FILTER_DATA(NULL, &data), RES_BAD_ARG); + CHECK(GET_FILTER_DATA(shape, &data), RES_OK); + CHECK(data, NULL); + + CHECK(SET_FILTER_FUNC(shape, NULL, NULL), RES_OK); + CHECK(GET_FILTER_DATA(shape, &data), RES_OK); + CHECK(data, NULL); + CHECK(SET_FILTER_FUNC(shape, filter_none, (void*)(uintptr_t)0xDEADBEEF), RES_OK); + CHECK(GET_FILTER_DATA(shape, &data), RES_OK); + CHECK((uintptr_t)data, 0xDEADBEEF); + #undef SET_FILTER_FUNC + #undef GET_FILTER_DATA + + CHECK(s2d_shape_create_line_segments(dev, &shape_copy), RES_OK); + CHECK(s2d_line_segments_copy(NULL, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_copy(shape, NULL), RES_BAD_ARG); + CHECK(s2d_line_segments_copy(NULL, shape_copy), RES_BAD_ARG); + CHECK(s2d_line_segments_copy(shape, shape_copy), RES_OK); + + CHECK(s2d_shape_ref_put(shape), RES_OK); + CHECK(s2d_shape_ref_put(shape_copy), RES_OK); + CHECK(s2d_device_ref_put(dev), RES_OK); + + check_memory_allocator(&allocator); + mem_shutdown_proxy_allocator(&allocator); + CHECK(mem_allocated_size(), 0); + return 0; +} + diff --git a/src/test_s2d_utils.h b/src/test_s2d_utils.h @@ -32,6 +32,55 @@ #include <rsys/mem_allocator.h> #include <stdio.h> +struct box_desc { + const float* vertices; + const unsigned* indices; +}; + +/******************************************************************************* + * Box geometry + ******************************************************************************/ +static const float box_verts[] = { + 552.f, 0.f, + 0.f, 0.f, + 0.f, 559.f, + 552.f, 559.f +}; +const unsigned box_nverts = sizeof(box_verts)/sizeof(float[2]); + +const unsigned box_ids[] = { + 0, 1, /* Bottom */ + 1, 2, /* Left */ + 2, 3, /* Top */ + 3, 0 /* Right */ +}; +const unsigned box_nsegs = sizeof(box_ids)/sizeof(unsigned[2]); + +static const struct box_desc box_desc = { box_verts, box_ids }; + +static INLINE void +box_get_ids(const unsigned isegment, unsigned ids[2], void* data) +{ + const unsigned id = isegment * 2; + const struct box_desc* desc = data; + NCHECK(desc, NULL); + ids[0] = desc->indices[id + 0]; + ids[1] = desc->indices[id + 1]; +} + +static INLINE void +box_get_position(const unsigned ivert, float position[2], void* data) +{ + const unsigned id = ivert * 2; + const struct box_desc* desc = data; + NCHECK(desc, NULL); + position[0] = desc->vertices[id + 0]; + position[1] = desc->vertices[id + 1]; +} + +/******************************************************************************* + * Miscellaneous function + ******************************************************************************/ static void check_memory_allocator(struct mem_allocator* allocator) {