diff options
Diffstat (limited to 'thirdparty/meshoptimizer/simplifier.cpp')
| -rw-r--r-- | thirdparty/meshoptimizer/simplifier.cpp | 62 |
1 files changed, 52 insertions, 10 deletions
diff --git a/thirdparty/meshoptimizer/simplifier.cpp b/thirdparty/meshoptimizer/simplifier.cpp index 0f10ebef4b..cf5db4e119 100644 --- a/thirdparty/meshoptimizer/simplifier.cpp +++ b/thirdparty/meshoptimizer/simplifier.cpp @@ -20,7 +20,7 @@ #define TRACESTATS(i) (void)0 #endif -#define ATTRIBUTES 8 +#define ATTRIBUTES 3 // This work is based on: // Michael Garland and Paul S. Heckbert. Surface simplification using quadric error metrics. 1997 @@ -445,6 +445,7 @@ struct Collapse float error; unsigned int errorui; }; + float distance_error; }; static float normalize(Vector3& v) @@ -525,6 +526,34 @@ static float quadricError(const Quadric& Q, const Vector3& v) return fabsf(r) * s; } +static float quadricErrorNoAttributes(const Quadric& Q, const Vector3& v) +{ + float rx = Q.b0; + float ry = Q.b1; + float rz = Q.b2; + + rx += Q.a10 * v.y; + ry += Q.a21 * v.z; + rz += Q.a20 * v.x; + + rx *= 2; + ry *= 2; + rz *= 2; + + rx += Q.a00 * v.x; + ry += Q.a11 * v.y; + rz += Q.a22 * v.z; + + float r = Q.c; + r += rx * v.x; + r += ry * v.y; + r += rz * v.z; + + float s = Q.w == 0.f ? 0.f : 1.f / Q.w; + + return fabsf(r) * s; +} + static void quadricFromPlane(Quadric& Q, float a, float b, float c, float d, float w) { float aw = a * w; @@ -680,7 +709,7 @@ static void quadricUpdateAttributes(Quadric& Q, const Vector3& p0, const Vector3 } #endif -static void fillFaceQuadrics(Quadric* vertex_quadrics, const unsigned int* indices, size_t index_count, const Vector3* vertex_positions, const unsigned int* remap) +static void fillFaceQuadrics(Quadric* vertex_quadrics, Quadric* vertex_no_attrib_quadrics, const unsigned int* indices, size_t index_count, const Vector3* vertex_positions, const unsigned int* remap) { for (size_t i = 0; i < index_count; i += 3) { @@ -690,6 +719,9 @@ static void fillFaceQuadrics(Quadric* vertex_quadrics, const unsigned int* indic Quadric Q; quadricFromTriangle(Q, vertex_positions[i0], vertex_positions[i1], vertex_positions[i2], 1.f); + quadricAdd(vertex_no_attrib_quadrics[remap[i0]], Q); + quadricAdd(vertex_no_attrib_quadrics[remap[i1]], Q); + quadricAdd(vertex_no_attrib_quadrics[remap[i2]], Q); #if ATTRIBUTES quadricUpdateAttributes(Q, vertex_positions[i0], vertex_positions[i1], vertex_positions[i2], Q.w); @@ -700,7 +732,7 @@ static void fillFaceQuadrics(Quadric* vertex_quadrics, const unsigned int* indic } } -static void fillEdgeQuadrics(Quadric* vertex_quadrics, const unsigned int* indices, size_t index_count, const Vector3* vertex_positions, const unsigned int* remap, const unsigned char* vertex_kind, const unsigned int* loop, const unsigned int* loopback) +static void fillEdgeQuadrics(Quadric* vertex_quadrics, Quadric* vertex_no_attrib_quadrics, const unsigned int* indices, size_t index_count, const Vector3* vertex_positions, const unsigned int* remap, const unsigned char* vertex_kind, const unsigned int* loop, const unsigned int* loopback) { for (size_t i = 0; i < index_count; i += 3) { @@ -744,6 +776,9 @@ static void fillEdgeQuadrics(Quadric* vertex_quadrics, const unsigned int* indic quadricAdd(vertex_quadrics[remap[i0]], Q); quadricAdd(vertex_quadrics[remap[i1]], Q); + + quadricAdd(vertex_no_attrib_quadrics[remap[i0]], Q); + quadricAdd(vertex_no_attrib_quadrics[remap[i1]], Q); } } } @@ -848,7 +883,7 @@ static size_t pickEdgeCollapses(Collapse* collapses, const unsigned int* indices return collapse_count; } -static void rankEdgeCollapses(Collapse* collapses, size_t collapse_count, const Vector3* vertex_positions, const Quadric* vertex_quadrics, const unsigned int* remap) +static void rankEdgeCollapses(Collapse* collapses, size_t collapse_count, const Vector3* vertex_positions, const Quadric* vertex_quadrics, const Quadric* vertex_no_attrib_quadrics, const unsigned int* remap) { for (size_t i = 0; i < collapse_count; ++i) { @@ -868,10 +903,14 @@ static void rankEdgeCollapses(Collapse* collapses, size_t collapse_count, const float ei = quadricError(qi, vertex_positions[i1]); float ej = quadricError(qj, vertex_positions[j1]); + const Quadric& naqi = vertex_no_attrib_quadrics[remap[i0]]; + const Quadric& naqj = vertex_no_attrib_quadrics[remap[j0]]; + // pick edge direction with minimal error c.v0 = ei <= ej ? i0 : j0; c.v1 = ei <= ej ? i1 : j1; c.error = ei <= ej ? ei : ej; + c.distance_error = ei <= ej ? quadricErrorNoAttributes(naqi, vertex_positions[i1]) : quadricErrorNoAttributes(naqj, vertex_positions[j1]); } } @@ -968,7 +1007,7 @@ static void sortEdgeCollapses(unsigned int* sort_order, const Collapse* collapse } } -static size_t performEdgeCollapses(unsigned int* collapse_remap, unsigned char* collapse_locked, Quadric* vertex_quadrics, const Collapse* collapses, size_t collapse_count, const unsigned int* collapse_order, const unsigned int* remap, const unsigned int* wedge, const unsigned char* vertex_kind, const Vector3* vertex_positions, const EdgeAdjacency& adjacency, size_t triangle_collapse_goal, float error_limit, float& result_error) +static size_t performEdgeCollapses(unsigned int* collapse_remap, unsigned char* collapse_locked, Quadric* vertex_quadrics, Quadric* vertex_no_attrib_quadrics, const Collapse* collapses, size_t collapse_count, const unsigned int* collapse_order, const unsigned int* remap, const unsigned int* wedge, const unsigned char* vertex_kind, const Vector3* vertex_positions, const EdgeAdjacency& adjacency, size_t triangle_collapse_goal, float error_limit, float& result_error) { size_t edge_collapses = 0; size_t triangle_collapses = 0; @@ -1030,6 +1069,7 @@ static size_t performEdgeCollapses(unsigned int* collapse_remap, unsigned char* assert(collapse_remap[r1] == r1); quadricAdd(vertex_quadrics[r1], vertex_quadrics[r0]); + quadricAdd(vertex_no_attrib_quadrics[r1], vertex_no_attrib_quadrics[r0]); if (vertex_kind[i0] == Kind_Complex) { @@ -1067,7 +1107,7 @@ static size_t performEdgeCollapses(unsigned int* collapse_remap, unsigned char* triangle_collapses += (vertex_kind[i0] == Kind_Border) ? 1 : 2; edge_collapses++; - result_error = result_error < c.error ? c.error : result_error; + result_error = result_error < c.distance_error ? c.distance_error : result_error; } #if TRACE @@ -1455,9 +1495,11 @@ size_t meshopt_simplifyWithAttributes(unsigned int* destination, const unsigned Quadric* vertex_quadrics = allocator.allocate<Quadric>(vertex_count); memset(vertex_quadrics, 0, vertex_count * sizeof(Quadric)); + Quadric* vertex_no_attrib_quadrics = allocator.allocate<Quadric>(vertex_count); + memset(vertex_no_attrib_quadrics, 0, vertex_count * sizeof(Quadric)); - fillFaceQuadrics(vertex_quadrics, indices, index_count, vertex_positions, remap); - fillEdgeQuadrics(vertex_quadrics, indices, index_count, vertex_positions, remap, vertex_kind, loop, loopback); + fillFaceQuadrics(vertex_quadrics, vertex_no_attrib_quadrics, indices, index_count, vertex_positions, remap); + fillEdgeQuadrics(vertex_quadrics, vertex_no_attrib_quadrics, indices, index_count, vertex_positions, remap, vertex_kind, loop, loopback); if (result != indices) memcpy(result, indices, index_count * sizeof(unsigned int)); @@ -1488,7 +1530,7 @@ size_t meshopt_simplifyWithAttributes(unsigned int* destination, const unsigned if (edge_collapse_count == 0) break; - rankEdgeCollapses(edge_collapses, edge_collapse_count, vertex_positions, vertex_quadrics, remap); + rankEdgeCollapses(edge_collapses, edge_collapse_count, vertex_positions, vertex_quadrics, vertex_no_attrib_quadrics, remap); #if TRACE > 1 dumpEdgeCollapses(edge_collapses, edge_collapse_count, vertex_kind); @@ -1507,7 +1549,7 @@ size_t meshopt_simplifyWithAttributes(unsigned int* destination, const unsigned printf("pass %d: ", int(pass_count++)); #endif - size_t collapses = performEdgeCollapses(collapse_remap, collapse_locked, vertex_quadrics, edge_collapses, edge_collapse_count, collapse_order, remap, wedge, vertex_kind, vertex_positions, adjacency, triangle_collapse_goal, error_limit, result_error); + size_t collapses = performEdgeCollapses(collapse_remap, collapse_locked, vertex_quadrics, vertex_no_attrib_quadrics, edge_collapses, edge_collapse_count, collapse_order, remap, wedge, vertex_kind, vertex_positions, adjacency, triangle_collapse_goal, error_limit, result_error); // no edges can be collapsed any more due to hitting the error limit or triangle collapse limit if (collapses == 0) |