forked from bartvdbraak/blender
519 lines
16 KiB
C++
519 lines
16 KiB
C++
/* Apache License, Version 2.0 */
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#include "testing/testing.h"
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/* Use to write out OBJ files, handy for checking output */
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// #define USE_OBJ_PREVIEW
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/* test every possible offset and reverse */
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#define USE_COMBINATIONS_ALL
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#define USE_BEAUTIFY
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extern "C" {
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#include "BLI_array.h"
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#include "BLI_polyfill2d.h"
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#include "BLI_math.h"
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#include "BLI_edgehash.h"
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#include "MEM_guardedalloc.h"
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#ifdef USE_OBJ_PREVIEW
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# include "BLI_string.h"
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#endif
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#ifdef USE_BEAUTIFY
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#include "BLI_polyfill2d_beautify.h"
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#include "BLI_memarena.h"
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#include "BLI_heap.h"
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#endif
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}
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static void polyfill_to_obj(
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const char *id,
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot);
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/* -------------------------------------------------------------------- */
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/* test utility functions */
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#define TRI_ERROR_VALUE (unsigned int)-1
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static void test_valid_polyfill_prepare(unsigned int tris[][3], unsigned int tris_tot)
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{
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unsigned int i;
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for (i = 0; i < tris_tot; i++) {
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unsigned int j;
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for (j = 0; j < 3; j++) {
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tris[i][j] = TRI_ERROR_VALUE;
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}
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}
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}
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/**
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* Basic check for face index values:
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*
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* - no duplicates.
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* - all tris set.
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* - all verts used at least once.
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*/
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static void test_polyfill_simple(
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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unsigned int i;
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int *tot_used = (int *)MEM_callocN(poly_tot * sizeof(int), __func__);
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for (i = 0; i < tris_tot; i++) {
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unsigned int j;
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for (j = 0; j < 3; j++) {
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EXPECT_NE(TRI_ERROR_VALUE, tris[i][j]);
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tot_used[tris[i][j]] += 1;
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}
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EXPECT_NE(tris[i][0], tris[i][1]);
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EXPECT_NE(tris[i][1], tris[i][2]);
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EXPECT_NE(tris[i][2], tris[i][0]);
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}
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for (i = 0; i < poly_tot; i++) {
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EXPECT_NE(0, tot_used[i]);
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}
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MEM_freeN(tot_used);
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}
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static void test_polyfill_topology(
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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EdgeHash *edgehash = BLI_edgehash_new(__func__);
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EdgeHashIterator *ehi;
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unsigned int i;
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for (i = 0; i < tris_tot; i++) {
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unsigned int j;
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for (j = 0; j < 3; j++) {
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const unsigned int v1 = tris[i][j];
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const unsigned int v2 = tris[i][(j + 1) % 3];
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void **p = BLI_edgehash_lookup_p(edgehash, v1, v2);
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if (p) {
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*p = (void *)((intptr_t)*p + (intptr_t)1);
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}
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else {
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BLI_edgehash_insert(edgehash, v1, v2, (void *)(intptr_t)1);
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}
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}
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}
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EXPECT_EQ(poly_tot + (poly_tot - 3), BLI_edgehash_size(edgehash));
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for (i = 0; i < poly_tot; i++) {
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const unsigned int v1 = i;
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const unsigned int v2 = (i + 1) % poly_tot;
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void **p = BLI_edgehash_lookup_p(edgehash, v1, v2);
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EXPECT_EQ(1, (void *)p != NULL);
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EXPECT_EQ(1, (intptr_t)*p);
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}
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for (ehi = BLI_edgehashIterator_new(edgehash), i = 0;
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BLI_edgehashIterator_isDone(ehi) == false;
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BLI_edgehashIterator_step(ehi), i++)
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{
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void **p = BLI_edgehashIterator_getValue_p(ehi);
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EXPECT_EQ(true, ELEM((intptr_t)*p, 1, 2));
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}
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BLI_edgehash_free(edgehash, NULL);
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}
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/**
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* Check all faces are flipped the same way
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*/
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static void test_polyfill_winding(
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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unsigned int i;
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unsigned int count[2] = {0, 0};
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for (i = 0; i < tris_tot; i++) {
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float winding_test = cross_tri_v2(poly[tris[i][0]], poly[tris[i][1]], poly[tris[i][2]]);
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if (fabsf(winding_test) > FLT_EPSILON) {
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count[winding_test < 0.0f] += 1;
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}
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}
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EXPECT_EQ(true, ELEM(0, count[0], count[1]));
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}
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/**
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* Check the accumulated triangle area is close to the original area.
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*/
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static void test_polyfill_area(
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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unsigned int i;
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const float area_tot = area_poly_v2(poly, poly_tot);
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float area_tot_tris = 0.0f;
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const float eps_abs = 0.00001f;
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const float eps = area_tot > 1.0f ? (area_tot * eps_abs) : eps_abs;
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for (i = 0; i < tris_tot; i++) {
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area_tot_tris += area_tri_v2(poly[tris[i][0]], poly[tris[i][1]], poly[tris[i][2]]);
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}
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EXPECT_NEAR(area_tot, area_tot_tris, eps);
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}
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/* -------------------------------------------------------------------- */
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/* Macro and helpers to manage checking */
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/**
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* Main template for polyfill testing.
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*/
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static void test_polyfill_template_check(
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const char *id, bool is_degenerate,
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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test_polyfill_simple(poly, poly_tot, tris, tris_tot);
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test_polyfill_topology(poly, poly_tot, tris, tris_tot);
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if (!is_degenerate) {
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test_polyfill_winding(poly, poly_tot, tris, tris_tot);
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test_polyfill_area(poly, poly_tot, tris, tris_tot);
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}
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polyfill_to_obj(id, poly, poly_tot, tris, tris_tot);
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}
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static void test_polyfill_template(
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const char *id, bool is_degenerate,
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const float poly[][2], const unsigned int poly_tot,
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unsigned int tris[][3], const unsigned int tris_tot)
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{
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test_valid_polyfill_prepare(tris, tris_tot);
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BLI_polyfill_calc(poly, poly_tot, 0, tris);
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/* check all went well */
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test_polyfill_template_check(id, is_degenerate, poly, poly_tot, tris, tris_tot);
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#ifdef USE_BEAUTIFY
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/* check beautify gives good results too */
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{
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MemArena *pf_arena = BLI_memarena_new(BLI_POLYFILL_ARENA_SIZE, __func__);
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Heap *pf_heap = BLI_heap_new_ex(BLI_POLYFILL_ALLOC_NGON_RESERVE);
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EdgeHash *pf_ehash = BLI_edgehash_new_ex(__func__, BLI_POLYFILL_ALLOC_NGON_RESERVE);
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BLI_polyfill_beautify(
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poly, poly_tot, tris,
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pf_arena, pf_heap, pf_ehash);
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test_polyfill_template_check(id, is_degenerate, poly, poly_tot, tris, tris_tot);
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BLI_memarena_free(pf_arena);
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BLI_heap_free(pf_heap, NULL);
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BLI_edgehash_free(pf_ehash, NULL);
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}
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#endif
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}
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#ifdef USE_COMBINATIONS_ALL
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static void test_polyfill_template_main(
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const char *id, bool is_degenerate,
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const float poly[][2], const unsigned int poly_tot,
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unsigned int tris[][3], const unsigned int tris_tot)
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{
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/* overkill? - try at _every_ offset & reverse */
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unsigned int poly_reverse;
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float (*poly_copy)[2] = (float (*)[2])MEM_mallocN(sizeof(float[2]) * poly_tot, id);
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float tmp[2];
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memcpy(poly_copy, poly, sizeof(float[2]) * poly_tot);
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for (poly_reverse = 0; poly_reverse < 2; poly_reverse++) {
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unsigned int poly_cycle;
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if (poly_reverse) {
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BLI_array_reverse(poly_copy, poly_tot);
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}
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for (poly_cycle = 0; poly_cycle < poly_tot; poly_cycle++) {
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// printf("polytest %s ofs=%d, reverse=%d\n", id, poly_cycle, poly_reverse);
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test_polyfill_template(id, is_degenerate, poly, poly_tot, tris, tris_tot);
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/* cycle */
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copy_v2_v2(tmp, poly_copy[0]);
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memmove(&poly_copy[0], &poly_copy[1], (poly_tot - 1) * sizeof(float[2]));
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copy_v2_v2(poly_copy[poly_tot - 1], tmp);
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}
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}
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MEM_freeN(poly_copy);
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}
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#else /* USE_COMBINATIONS_ALL */
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static void test_polyfill_template_main(
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const char *id, bool is_degenerate,
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const float poly[][2], const unsigned int poly_tot,
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unsigned int tris[][3], const unsigned int tris_tot)
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{
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test_polyfill_template(id, is_degenerate, poly, poly_tot, tris, tris_tot);
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}
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#endif /* USE_COMBINATIONS_ALL */
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#define TEST_POLYFILL_TEMPLATE_STATIC(poly, is_degenerate) \
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{ \
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unsigned int tris[POLY_TRI_COUNT(ARRAY_SIZE(poly))][3]; \
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const unsigned int poly_tot = ARRAY_SIZE(poly); \
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const unsigned int tris_tot = ARRAY_SIZE(tris); \
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const char *id = typeid(*this).name(); \
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\
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test_polyfill_template_main(id, is_degenerate, poly, poly_tot, tris, tris_tot); \
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} (void)0
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/* -------------------------------------------------------------------- */
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/* visualisation functions (not needed for testing) */
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#ifdef USE_OBJ_PREVIEW
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static void polyfill_to_obj(
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const char *id,
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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char path[1024];
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FILE *f;
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unsigned int i;
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BLI_snprintf(path, sizeof(path), "%s.obj", id);
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f = fopen(path, "w");
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if (!f) {
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return;
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}
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for (i = 0; i < poly_tot; i++) {
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fprintf(f, "v %f %f 0.0\n", UNPACK2(poly[i]));
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}
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for (i = 0; i < tris_tot; i++) {
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fprintf(f, "f %u %u %u\n", UNPACK3_EX(1 +, tris[i], ));
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}
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fclose(f);
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}
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#else
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static void polyfill_to_obj(
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const char *id,
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const float poly[][2], const unsigned int poly_tot,
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const unsigned int tris[][3], const unsigned int tris_tot)
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{
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(void)id;
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(void)poly, (void)poly_tot;
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(void)tris, (void)tris_tot;
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}
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#endif /* USE_OBJ_PREVIEW */
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/* -------------------------------------------------------------------- */
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/* tests */
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#define POLY_TRI_COUNT(len) ((len) - 2)
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/* A counterclockwise triangle */
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TEST(polyfill2d, TriangleCCW)
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{
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const float poly[][2] = {{0, 0}, {0, 1}, {1, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* A counterclockwise square */
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TEST(polyfill2d, SquareCCW)
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{
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const float poly[][2] = {{0, 0}, {0, 1}, {1, 1}, {1, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* A clockwise square */
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TEST(polyfill2d, SquareCW)
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{
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const float poly[][2] = {{0, 0}, {1, 0}, {1, 1}, {0, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Starfleet insigna */
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TEST(polyfill2d, Starfleet)
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{
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const float poly[][2] = {{0, 0}, {0.6f, 0.4f}, {1, 0}, {0.5f, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Starfleet insigna with repeated point */
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TEST(polyfill2d, StarfleetDegenerate)
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{
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const float poly[][2] = {{0, 0}, {0.6f, 0.4f}, {0.6f, 0.4f}, {1, 0}, {0.5f, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Three collinear points */
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TEST(polyfill2d, 3Colinear)
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{
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const float poly[][2] = {{0, 0}, {1, 0}, {2, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Four collinear points */
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TEST(polyfill2d, 4Colinear)
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{
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const float poly[][2] = {{0, 0}, {1, 0}, {2, 0}, {3, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Non-consecutive collinear points */
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TEST(polyfill2d, UnorderedColinear)
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{
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const float poly[][2] = {{0, 0}, {1, 1}, {2, 0}, {3, 1}, {4, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Plus shape */
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TEST(polyfill2d, PlusShape)
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{
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const float poly[][2] = {
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{1, 0}, {2, 0}, {2, 1}, {3, 1}, {3, 2}, {2, 2}, {2, 3}, {1, 3}, {1, 2}, {0, 2}, {0, 1}, {1, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Star shape */
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TEST(polyfill2d, StarShape)
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{
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const float poly[][2] = {
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{4, 0}, {5, 3}, {8, 4}, {5, 5}, {4, 8}, {3, 5}, {0, 4}, {3, 3}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* U shape */
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TEST(polyfill2d, UShape)
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{
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const float poly[][2] = {
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{1, 0}, {2, 0}, {3, 1}, {3, 3}, {2, 3}, {2, 1}, {1, 1}, {1, 3}, {0, 3}, {0, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Spiral */
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TEST(polyfill2d, Spiral)
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{
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const float poly[][2] = {
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{1, 0}, {4, 0}, {5, 1}, {5, 4}, {4, 5}, {1, 5}, {0, 4}, {0, 3},
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{1, 2}, {2, 2}, {3, 3}, {1, 3}, {1, 4}, {4, 4}, {4, 1}, {0, 1}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Test case from http:# www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml */
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TEST(polyfill2d, TestFlipCode)
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{
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const float poly[][2] = {
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{0, 6}, {0, 0}, {3, 0}, {4, 1}, {6, 1}, {8, 0}, {12, 0}, {13, 2},
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{8, 2}, {8, 4}, {11, 4}, {11, 6}, {6, 6}, {4, 3}, {2, 6}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Self-intersection */
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TEST(polyfill2d, SelfIntersect)
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{
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const float poly[][2] = {{0, 0}, {1, 1}, {2, -1}, {3, 1}, {4, 0}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, true);
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}
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/* Self-touching */
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TEST(polyfill2d, SelfTouch)
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{
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const float poly[][2] = {
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{0, 0}, {4, 0}, {4, 4}, {2, 4}, {2, 3}, {3, 3}, {3, 1}, {1, 1}, {1, 3}, {2, 3}, {2, 4}, {0, 4}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Self-overlapping */
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TEST(polyfill2d, SelfOverlap)
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{
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const float poly[][2] = {
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{0, 0}, {4, 0}, {4, 4}, {1, 4}, {1, 3}, {3, 3}, {3, 1}, {1, 1}, {1, 3}, {3, 3}, {3, 4}, {0, 4}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, true);
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}
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/* Test case from http:# www.davdata.nl/math/polygons.html */
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TEST(polyfill2d, TestDavData)
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{
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const float poly[][2] = {
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{190, 480}, {140, 180}, {310, 100}, {330, 390}, {290, 390}, {280, 260}, {220, 260}, {220, 430}, {370, 430},
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{350, 30}, {50, 30}, {160, 560}, {730, 510}, {710, 20}, {410, 30}, {470, 440}, {640, 410}, {630, 140},
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{590, 140}, {580, 360}, {510, 370}, {510, 60}, {650, 70}, {660, 450}, {190, 480}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Issue 815, http:# code.google.com/p/libgdx/issues/detail?id=815 */
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TEST(polyfill2d, Issue815)
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{
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const float poly[][2] = {
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{-2.0f, 0.0f}, {-2.0f, 0.5f}, {0.0f, 1.0f}, {0.5f, 2.875f},
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{1.0f, 0.5f}, {1.5f, 1.0f}, {2.0f, 1.0f}, {2.0f, 0.0f}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Issue 207, comment #1, http:# code.google.com/p/libgdx/issues/detail?id=207#c1 */
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TEST(polyfill2d, Issue207_1)
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{
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const float poly[][2] = {
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{72.42465f, 197.07095f}, {78.485535f, 189.92776f}, {86.12059f, 180.92929f}, {99.68253f, 164.94557f},
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{105.24325f, 165.79604f}, {107.21862f, 166.09814f}, {112.41958f, 162.78253f}, {113.73238f, 161.94562f},
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{123.29477f, 167.93805f}, {126.70667f, 170.07617f}, {73.22717f, 199.51062f}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, true);
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}
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/* Issue 207, comment #11, http:# code.google.com/p/libgdx/issues/detail?id=207#c11 */
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/* Also on issue 1081, http:# code.google.com/p/libgdx/issues/detail?id=1081 */
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TEST(polyfill2d, Issue207_11)
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{
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const float poly[][2] = {
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{2400.0f, 480.0f}, {2400.0f, 176.0f}, {1920.0f, 480.0f}, {1920.0459f, 484.22314f},
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{1920.1797f, 487.91016f}, {1920.3955f, 491.0874f}, {1920.6875f, 493.78125f}, {1921.0498f, 496.01807f},
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{1921.4766f, 497.82422f}, {1921.9619f, 499.22607f}, {1922.5f, 500.25f}, {1923.085f, 500.92236f},
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{1923.7109f, 501.26953f}, {1924.3721f, 501.31787f}, {1925.0625f, 501.09375f}, {1925.7764f, 500.62354f},
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{1926.5078f, 499.9336f}, {1927.251f, 499.0503f}, {1928.0f, 498.0f}, {1928.749f, 496.80908f},
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{1929.4922f, 495.5039f}, {1930.2236f, 494.11084f}, {1930.9375f, 492.65625f}, {1931.6279f, 491.1665f},
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{1932.2891f, 489.66797f}, {1932.915f, 488.187f}, {1933.5f, 486.75f}, {1934.0381f, 485.3833f},
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{1934.5234f, 484.11328f}, {1934.9502f, 482.9663f}, {1935.3125f, 481.96875f}, {1935.6045f, 481.14697f},
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{1935.8203f, 480.52734f}, {1935.9541f, 480.13623f}, {1936.0f, 480.0f}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Issue 1407, http:# code.google.com/p/libgdx/issues/detail?id=1407 */
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TEST(polyfill2d, Issue1407)
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{
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const float poly[][2] = {
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{3.914329f, 1.9008259f}, {4.414321f, 1.903619f}, {4.8973203f, 1.9063174f}, {5.4979978f, 1.9096732f}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Issue 1407, http:# code.google.com/p/libgdx/issues/detail?id=1407, */
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/* with an additional point to show what is happening. */
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TEST(polyfill2d, Issue1407_pt)
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{
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const float poly[][2] = {
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{3.914329f, 1.9008259f}, {4.414321f, 1.903619f}, {4.8973203f, 1.9063174f}, {5.4979978f, 1.9096732f}, {4, 4}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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/* Simplified from Blender bug T40777 */
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TEST(polyfill2d, IssueT40777_colinear)
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|
{
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|
const float poly[][2] = {
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{0.7, 0.37}, {0.7, 0}, {0.76, 0}, {0.76, 0.4}, {0.83, 0.4}, {0.83, 0}, {0.88, 0}, {0.88, 0.4},
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{0.94, 0.4}, {0.94, 0}, {1, 0}, {1, 0.4}, {0.03, 0.62}, {0.03, 0.89}, {0.59, 0.89}, {0.03, 1},
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{0, 1}, {0, 0}, {0.03, 0}, {0.03, 0.37}};
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TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
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}
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|
|
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/* Blender bug T41986 */
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|
TEST(polyfill2d, IssueT41986_axis_align)
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|
{
|
|
const float poly[][2] = {
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|
{-0.25, -0.07}, {-0.25, 0.27}, {-1.19, 0.14}, {-0.06, 0.73}, {0.17, 1.25}, {-0.25, 1.07},
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|
{-0.38, 1.02}, {-0.25, 0.94}, {-0.40, 0.90}, {-0.41, 0.86}, {-0.34, 0.83}, {-0.25, 0.82},
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|
{-0.66, 0.73}, {-0.56, 1.09}, {-0.25, 1.10}, {0.00, 1.31}, {-0.03, 1.47}, {-0.25, 1.53},
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|
{0.12, 1.62}, {0.36, 1.07}, {0.12, 0.67}, {0.29, 0.57}, {0.44, 0.45}, {0.57, 0.29},
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|
{0.66, 0.12}, {0.68, 0.06}, {0.57, -0.36}, {-0.25, -0.37}, {0.49, -0.74}, {-0.59, -1.21},
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|
{-0.25, -0.15}, {-0.46, -0.52}, {-1.08, -0.83}, {-1.45, -0.33}, {-1.25, -0.04}};
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|
|
|
TEST_POLYFILL_TEMPLATE_STATIC(poly, false);
|
|
}
|