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Add ArchStrip

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This commit is contained in:
Georg Hagen
2024-07-28 17:41:33 +02:00
parent 2fdb2230df
commit d5952d1f87
2 changed files with 46 additions and 1 deletions
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46
openVulkanoCpp/Scene/GeometryFactory.cpp
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@@ -307,4 +307,48 @@ namespace OpenVulkano::Scene
return result;
}
}
Geometry GeometryFactory::MakeArchStrip(float radius, float width, float endRadius, int segments, const Math::Vector4f& color, float endVCoord, bool indexBuffer)
{
Geometry result;
segments = std::max(2, segments);
result.Init(2 * segments, indexBuffer ? 6 * segments : 0);
const float segmentAngle = endRadius / static_cast<float>(segments - 1);
width /= 2;
const float segmentV = endVCoord / (segments - 1);
float segV = 0;
for(int i = 0, seg = 0; seg < segments; seg++)
{
float angle = seg * segmentAngle;
float z = std::cos(angle) * radius;
float y = std::sin(angle) * radius;
//TODO normals
result.vertices[i].color = color;
result.vertices[i++].Set(width, y, z, +0, +0, +1, +1, +segV);
result.vertices[i].color = color;
result.vertices[i++].Set(-width, y, z, +0, +0, +1, +0, +segV);
segV += segmentV;
}
if (indexBuffer)
{
uint32_t* indices = new uint32_t[result.GetIndexCount()];
for (uint32_t i = 0, segment = 0; segment < segments; ++segment)
{
uint32_t first = segment * 2;
uint32_t second = first + 1;
indices[i++] = first;
indices[i++] = second;
indices[i++] = first + 2;
indices[i++] = first + 2;
indices[i++] = second;
indices[i++] = second + 2;
}
result.SetIndices(indices, result.GetIndexCount());
}
return result;
}
}

1
openVulkanoCpp/Scene/GeometryFactory.hpp
View File

@@ -20,5 +20,6 @@ namespace OpenVulkano::Scene
static Geometry MakeTriangle(const Math::Vector3f& p1, const Math::Vector3f& p2, const Math::Vector3f& p3, const Math::Vector4f& color = Math::Vector4f(1));
static Geometry MakeCylinder(float radius, float height, uint32_t segments, const Math::Vector4f& color = Math::Vector4f(1));
static Geometry MakePyramid(float baseLength = 1, float height = 1, const Math::Vector4f& color = Math::Vector4f(1));
static Geometry MakeArchStrip(float radius = 1, float width = 0.2, float endRadius = std::numbers::pi, int segments = 16, const Math::Vector4f& color = Math::Vector4f(1), float endVCoord = 1, bool indexBuffer = true);
};
}