forked from bartvdbraak/blender
98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/* Apache License, Version 2.0 */
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#include "testing/testing.h"
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/* TODO: ray intersection, overlap ... etc.*/
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extern "C" {
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#include "BLI_compiler_attrs.h"
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#include "BLI_kdopbvh.h"
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#include "BLI_rand.h"
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#include "BLI_math_vector.h"
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#include "MEM_guardedalloc.h"
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}
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#include "stubs/bf_intern_eigen_stubs.h"
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/* -------------------------------------------------------------------- */
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/* Helper Functions */
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static void rng_v3_round(
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float *coords, int coords_len,
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struct RNG *rng, int round, float scale)
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{
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for (int i = 0; i < coords_len; i++) {
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float f = BLI_rng_get_float(rng) * 2.0f - 1.0f;
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coords[i] = ((float)((int)(f * round)) / (float)round) * scale;
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}
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}
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/* -------------------------------------------------------------------- */
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/* Tests */
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TEST(kdopbvh, Empty)
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{
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BVHTree *tree = BLI_bvhtree_new(0, 0.0, 8, 8);
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BLI_bvhtree_balance(tree);
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EXPECT_EQ(0, BLI_bvhtree_get_size(tree));
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BLI_bvhtree_free(tree);
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}
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TEST(kdopbvh, Single)
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{
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BVHTree *tree = BLI_bvhtree_new(1, 0.0, 8, 8);
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{
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float co[3] = {0};
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BLI_bvhtree_insert(tree, 0, co, 1);
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}
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EXPECT_EQ(BLI_bvhtree_get_size(tree), 1);
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BLI_bvhtree_balance(tree);
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BLI_bvhtree_free(tree);
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}
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/**
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* Note that a small epsilon is added to the BVH nodes bounds, even if we pass in zero.
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* Use rounding to ensure very close nodes don't cause the wrong node to be found as nearest.
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*/
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static void find_nearest_points_test(int points_len, float scale, int round, int random_seed)
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{
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struct RNG *rng = BLI_rng_new(random_seed);
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BVHTree *tree = BLI_bvhtree_new(points_len, 0.0, 8, 8);
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void *mem = MEM_mallocN(sizeof(float[3]) * points_len, __func__);
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float (*points)[3] = (float (*)[3])mem;
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for (int i = 0; i < points_len; i++) {
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rng_v3_round(points[i], 3, rng, round, scale);
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BLI_bvhtree_insert(tree, i, points[i], 1);
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}
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BLI_bvhtree_balance(tree);
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/* first find each point */
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for (int i = 0; i < points_len; i++) {
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const int j = BLI_bvhtree_find_nearest(tree, points[i], NULL, NULL, NULL);
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if (j != i) {
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#if 0
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const float dist = len_v3v3(points[i], points[j]);
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if (dist > (1.0f / (float)round)) {
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printf("%.15f (%d %d)\n", dist, i, j);
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print_v3_id(points[i]);
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print_v3_id(points[j]);
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fflush(stdout);
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}
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#endif
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EXPECT_GE(j, 0);
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EXPECT_LT(j, points_len);
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EXPECT_EQ_ARRAY(points[i], points[j], 3);
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}
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}
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BLI_bvhtree_free(tree);
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BLI_rng_free(rng);
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MEM_freeN(points);
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}
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TEST(kdopbvh, FindNearest_1) { find_nearest_points_test(1, 1.0, 1000, 1234); }
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TEST(kdopbvh, FindNearest_2) { find_nearest_points_test(2, 1.0, 1000, 123); }
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TEST(kdopbvh, FindNearest_500) { find_nearest_points_test(500, 1.0, 1000, 12); }
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