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Diffstat (limited to 'chromium/third_party/angle/samples/angle/sample_util/geometry_utils.cpp')
-rw-r--r--chromium/third_party/angle/samples/angle/sample_util/geometry_utils.cpp145
1 files changed, 145 insertions, 0 deletions
diff --git a/chromium/third_party/angle/samples/angle/sample_util/geometry_utils.cpp b/chromium/third_party/angle/samples/angle/sample_util/geometry_utils.cpp
new file mode 100644
index 00000000000..a4bc2f7eba4
--- /dev/null
+++ b/chromium/third_party/angle/samples/angle/sample_util/geometry_utils.cpp
@@ -0,0 +1,145 @@
+//
+// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#include "geometry_utils.h"
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+
+void CreateSphereGeometry(size_t sliceCount, float radius, SphereGeometry *result)
+{
+ size_t parellelCount = sliceCount / 2;
+ size_t vertexCount = (parellelCount + 1) * (sliceCount + 1);
+ size_t indexCount = parellelCount * sliceCount * 6;
+ float angleStep = (2.0f * M_PI) / sliceCount;
+
+ result->positions.resize(vertexCount);
+ result->normals.resize(vertexCount);
+ for (size_t i = 0; i < parellelCount + 1; i++)
+ {
+ for (size_t j = 0; j < sliceCount + 1; j++)
+ {
+ Vector3 direction(sinf(angleStep * i) * sinf(angleStep * j),
+ cosf(angleStep * i),
+ sinf(angleStep * i) * cosf(angleStep * j));
+
+ size_t vertexIdx = i * (sliceCount + 1) + j;
+ result->positions[vertexIdx] = direction * radius;
+ result->normals[vertexIdx] = direction;
+ }
+ }
+
+ result->indices.clear();
+ result->indices.reserve(indexCount);
+ for (size_t i = 0; i < parellelCount; i++)
+ {
+ for (size_t j = 0; j < sliceCount; j++)
+ {
+ result->indices.push_back( i * (sliceCount + 1) + j );
+ result->indices.push_back((i + 1) * (sliceCount + 1) + j );
+ result->indices.push_back((i + 1) * (sliceCount + 1) + (j + 1));
+
+ result->indices.push_back( i * (sliceCount + 1) + j );
+ result->indices.push_back((i + 1) * (sliceCount + 1) + (j + 1));
+ result->indices.push_back( i * (sliceCount + 1) + (j + 1));
+ }
+ }
+}
+
+void GenerateCubeGeometry(float radius, CubeGeometry *result)
+{
+ result->positions.resize(24);
+ result->positions[ 0] = Vector3(-radius, -radius, -radius);
+ result->positions[ 1] = Vector3(-radius, -radius, radius);
+ result->positions[ 2] = Vector3( radius, -radius, radius);
+ result->positions[ 3] = Vector3( radius, -radius, -radius);
+ result->positions[ 4] = Vector3(-radius, radius, -radius);
+ result->positions[ 5] = Vector3(-radius, radius, radius);
+ result->positions[ 6] = Vector3( radius, radius, radius);
+ result->positions[ 7] = Vector3( radius, radius, -radius);
+ result->positions[ 8] = Vector3(-radius, -radius, -radius);
+ result->positions[ 9] = Vector3(-radius, radius, -radius);
+ result->positions[10] = Vector3( radius, radius, -radius);
+ result->positions[11] = Vector3( radius, -radius, -radius);
+ result->positions[12] = Vector3(-radius, -radius, radius);
+ result->positions[13] = Vector3(-radius, radius, radius);
+ result->positions[14] = Vector3( radius, radius, radius);
+ result->positions[15] = Vector3( radius, -radius, radius);
+ result->positions[16] = Vector3(-radius, -radius, -radius);
+ result->positions[17] = Vector3(-radius, -radius, radius);
+ result->positions[18] = Vector3(-radius, radius, radius);
+ result->positions[19] = Vector3(-radius, radius, -radius);
+ result->positions[20] = Vector3( radius, -radius, -radius);
+ result->positions[21] = Vector3( radius, -radius, radius);
+ result->positions[22] = Vector3( radius, radius, radius);
+ result->positions[23] = Vector3( radius, radius, -radius);
+
+ result->normals.resize(24);
+ result->normals[ 0] = Vector3( 0.0f, -1.0f, 0.0f);
+ result->normals[ 1] = Vector3( 0.0f, -1.0f, 0.0f);
+ result->normals[ 2] = Vector3( 0.0f, -1.0f, 0.0f);
+ result->normals[ 3] = Vector3( 0.0f, -1.0f, 0.0f);
+ result->normals[ 4] = Vector3( 0.0f, 1.0f, 0.0f);
+ result->normals[ 5] = Vector3( 0.0f, 1.0f, 0.0f);
+ result->normals[ 6] = Vector3( 0.0f, 1.0f, 0.0f);
+ result->normals[ 7] = Vector3( 0.0f, 1.0f, 0.0f);
+ result->normals[ 8] = Vector3( 0.0f, 0.0f, -1.0f);
+ result->normals[ 9] = Vector3( 0.0f, 0.0f, -1.0f);
+ result->normals[10] = Vector3( 0.0f, 0.0f, -1.0f);
+ result->normals[11] = Vector3( 0.0f, 0.0f, -1.0f);
+ result->normals[12] = Vector3( 0.0f, 0.0f, 1.0f);
+ result->normals[13] = Vector3( 0.0f, 0.0f, 1.0f);
+ result->normals[14] = Vector3( 0.0f, 0.0f, 1.0f);
+ result->normals[15] = Vector3( 0.0f, 0.0f, 1.0f);
+ result->normals[16] = Vector3(-1.0f, 0.0f, 0.0f);
+ result->normals[17] = Vector3(-1.0f, 0.0f, 0.0f);
+ result->normals[18] = Vector3(-1.0f, 0.0f, 0.0f);
+ result->normals[19] = Vector3(-1.0f, 0.0f, 0.0f);
+ result->normals[20] = Vector3( 1.0f, 0.0f, 0.0f);
+ result->normals[21] = Vector3( 1.0f, 0.0f, 0.0f);
+ result->normals[22] = Vector3( 1.0f, 0.0f, 0.0f);
+ result->normals[23] = Vector3( 1.0f, 0.0f, 0.0f);
+
+ result->texcoords.resize(24);
+ result->texcoords[ 0] = Vector2(0.0f, 0.0f);
+ result->texcoords[ 1] = Vector2(0.0f, 1.0f);
+ result->texcoords[ 2] = Vector2(1.0f, 1.0f);
+ result->texcoords[ 3] = Vector2(1.0f, 0.0f);
+ result->texcoords[ 4] = Vector2(1.0f, 0.0f);
+ result->texcoords[ 5] = Vector2(1.0f, 1.0f);
+ result->texcoords[ 6] = Vector2(0.0f, 1.0f);
+ result->texcoords[ 7] = Vector2(0.0f, 0.0f);
+ result->texcoords[ 8] = Vector2(0.0f, 0.0f);
+ result->texcoords[ 9] = Vector2(0.0f, 1.0f);
+ result->texcoords[10] = Vector2(1.0f, 1.0f);
+ result->texcoords[11] = Vector2(1.0f, 0.0f);
+ result->texcoords[12] = Vector2(0.0f, 0.0f);
+ result->texcoords[13] = Vector2(0.0f, 1.0f);
+ result->texcoords[14] = Vector2(1.0f, 1.0f);
+ result->texcoords[15] = Vector2(1.0f, 0.0f);
+ result->texcoords[16] = Vector2(0.0f, 0.0f);
+ result->texcoords[17] = Vector2(0.0f, 1.0f);
+ result->texcoords[18] = Vector2(1.0f, 1.0f);
+ result->texcoords[19] = Vector2(1.0f, 0.0f);
+ result->texcoords[20] = Vector2(0.0f, 0.0f);
+ result->texcoords[21] = Vector2(0.0f, 1.0f);
+ result->texcoords[22] = Vector2(1.0f, 1.0f);
+ result->texcoords[23] = Vector2(1.0f, 0.0f);
+
+ result->indices.resize(36);
+ result->indices[ 0] = 0; result->indices[ 1] = 2; result->indices[ 2] = 1;
+ result->indices[ 3] = 0; result->indices[ 4] = 3; result->indices[ 5] = 2;
+ result->indices[ 6] = 4; result->indices[ 7] = 5; result->indices[ 8] = 6;
+ result->indices[ 9] = 4; result->indices[10] = 6; result->indices[11] = 7;
+ result->indices[12] = 8; result->indices[13] = 9; result->indices[14] = 10;
+ result->indices[15] = 8; result->indices[16] = 10; result->indices[17] = 11;
+ result->indices[18] = 12; result->indices[19] = 15; result->indices[20] = 14;
+ result->indices[21] = 12; result->indices[22] = 14; result->indices[23] = 13;
+ result->indices[24] = 16; result->indices[25] = 17; result->indices[26] = 18;
+ result->indices[27] = 16; result->indices[28] = 18; result->indices[29] = 19;
+ result->indices[30] = 20; result->indices[31] = 23; result->indices[32] = 22;
+ result->indices[33] = 20; result->indices[34] = 22; result->indices[35] = 21;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-07 17:57:11 +0000