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Diffstat (limited to 'source/30-game/CommonVertexIndex.cpp')
| -rw-r--r-- | source/30-game/CommonVertexIndex.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/source/30-game/CommonVertexIndex.cpp b/source/30-game/CommonVertexIndex.cpp new file mode 100644 index 0000000..786274e --- /dev/null +++ b/source/30-game/CommonVertexIndex.cpp @@ -0,0 +1,152 @@ +#include "CommonVertexIndex.hpp" + +template <class TNumber> +static void AssignIndices(TNumber indices[6], TNumber startIdx) { + // Triangle #1 + indices[0] = startIdx + 1; // Top right + indices[1] = startIdx + 0; // Top left + indices[2] = startIdx + 3; // Bottom left + // Triangle #2 + indices[3] = startIdx + 1; // Top right + indices[4] = startIdx + 3; // Bottom left + indices[5] = startIdx + 2; // Bottom right +} + +template <class TNumber> +static void AssignIndices(TNumber indices[6], TNumber topLeft, TNumber topRight, TNumber bottomRight, TNumber bottomLeft) { + // Triangle #1 + indices[0] = topRight; + indices[1] = topLeft; + indices[2] = bottomLeft; + // Triangle #2 + indices[3] = topRight; + indices[4] = bottomLeft; + indices[5] = bottomRight; +} + +template <class TVertex> +static void AssignPositions(TVertex vertices[4], const Rect<float>& rect) { + // Top left + vertices[0].x = rect.x0(); + vertices[0].y = rect.y0(); + // Top right + vertices[1].x = rect.x1(); + vertices[1].y = rect.y0(); + // Bottom right + vertices[2].x = rect.x1(); + vertices[2].y = rect.y1(); + // Bottom left + vertices[3].x = rect.x0(); + vertices[3].y = rect.y1(); +} + +template <class TVertex> +static void AssignPositions(TVertex vertices[4], glm::vec2 bl, glm::vec2 tr) { + // Top left + vertices[0].x = bl.x; + vertices[0].y = tr.y; + // Top right + vertices[1].x = tr.x; + vertices[1].y = tr.y; + // Bottom right + vertices[2].x = tr.x; + vertices[2].y = bl.y; + // Bottom left + vertices[3].x = bl.x; + vertices[3].y = bl.y; +} + +template <class TVertex> +static void AssignDepths(TVertex vertices[4], float z) { + for (int i = 0; i < 4; ++i) { + auto& vert = vertices[i]; + vert.z = z; + } +} + +template <class TVertex> +static void AssignTexCoords(TVertex vertices[4], const Subregion& texcoords) { + // Top left + vertices[0].u = texcoords.u0; + vertices[0].v = texcoords.v1; + // Top right + vertices[1].u = texcoords.u1; + vertices[1].v = texcoords.v1; + // Bottom right + vertices[2].u = texcoords.u1; + vertices[2].v = texcoords.v0; + // Bottom left + vertices[3].u = texcoords.u0; + vertices[3].v = texcoords.v0; +} + +template <class TVertex> +static void AssignColors(TVertex vertices[4], RgbaColor color) { + for (int i = 0; i < 4; ++i) { + auto& vert = vertices[i]; + vert.r = color.r; + vert.g = color.g; + vert.b = color.b; + vert.a = color.a; + } +} + +void Index_U16::Assign(uint16_t indices[6], uint16_t startIdx) { + ::AssignIndices(indices, startIdx); +} + +void Index_U16::Assign(uint16_t indices[6], uint16_t startIdx, uint16_t topLeft, uint16_t topRight, uint16_t bottomRight, uint16_t bottomLeft) { + ::AssignIndices<uint16_t>(indices, startIdx + topLeft, startIdx + topRight, startIdx + bottomRight, startIdx + bottomLeft); +} + +void Index_U16::Assign(uint16_t indices[6], uint16_t topLeft, uint16_t topRight, uint16_t bottomRight, uint16_t bottomLeft) { + ::AssignIndices<uint16_t>(indices, topLeft, topRight, bottomRight, bottomLeft); +} + +void Index_U32::Assign(uint32_t indices[6], uint32_t startIdx) { + ::AssignIndices(indices, startIdx); +} + +void Index_U32::Assign(uint32_t indices[6], uint32_t startIdx, uint32_t topLeft, uint32_t topRight, uint32_t bottomRight, uint32_t bottomLeft) { + ::AssignIndices<uint32_t>(indices, startIdx + topLeft, startIdx + topRight, startIdx + bottomRight, startIdx + bottomLeft); +} + +void Index_U32::Assign(uint32_t indices[6], uint32_t topLeft, uint32_t topRight, uint32_t bottomRight, uint32_t bottomLeft) { + ::AssignIndices<uint32_t>(indices, topLeft, topRight, bottomRight, bottomLeft); +} + +void Vertex_PC::Assign(Vertex_PC vertices[4], const Rect<float>& rect) { + ::AssignPositions(vertices, rect); +} + +void Vertex_PC::Assign(Vertex_PC vertices[4], glm::vec2 bottomLeft, glm::vec2 topRight) { + ::AssignPositions(vertices, bottomLeft, topRight); +} + +void Vertex_PC::Assign(Vertex_PC vertices[4], float z) { + ::AssignDepths(vertices, z); +} + +void Vertex_PC::Assign(Vertex_PC vertices[4], RgbaColor color) { + ::AssignColors(vertices, color); +} + +void Vertex_PTC::Assign(Vertex_PTC vertices[4], const Rect<float>& rect) { + ::AssignPositions(vertices, rect); +} + +void Vertex_PTC::Assign(Vertex_PTC vertices[4], glm::vec2 bottomLeft, glm::vec2 topRight) { + ::AssignPositions(vertices, bottomLeft, topRight); +} + +void Vertex_PTC::Assign(Vertex_PTC vertices[4], float z) { + ::AssignDepths(vertices, z); +} + +void Vertex_PTC::Assign(Vertex_PTC vertices[4], const Subregion& texcoords) { + ::AssignTexCoords(vertices, texcoords); +} + +void Vertex_PTC::Assign(Vertex_PTC vertices[4], RgbaColor color) { + ::AssignColors(vertices, color); +} |