b3b7fd0281
Batch #836 by ragnarok-clanker: 0 byte-identical, 2 confirmed by peer review. - fn_02104 CRenderer::ProjectViewport: logic confirmed by peer review - fn_02105 CRenderer::ProjectViewportCentered: logic confirmed by peer review Reviewed-by: ragnarok-clanker Adds to the build: Source/Render/ViewportProjection.cpp
24 lines
1.4 KiB
C++
24 lines
1.4 KiB
C++
#include "Render/Renderer.h"
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// FUNCTION: fn_02104
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float* CRenderer::ProjectViewport(const float* position, const float* matrix, float* x, float* y, float* reciprocalDepth) {
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const float inverse = 1.0f / (((matrix[2] * position[0] + matrix[5] * position[1]) + matrix[8] * position[2]) + matrix[11]);
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*reciprocalDepth = inverse;
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*x = (((((matrix[3] * position[1] + position[0] * matrix[0]) + matrix[6] * position[2]) + matrix[9]) * inverse) * this->viewport.scaleX) +
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static_cast<float>(this->viewport.clipCenterX);
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*y = (((((matrix[1] * position[0] + matrix[4] * position[1]) + matrix[7] * position[2]) + matrix[10]) * *reciprocalDepth) * this->viewport.scaleY) +
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static_cast<float>(this->viewport.clipCenterY);
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return y;
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}
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// FUNCTION: fn_02105
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float* CRenderer::ProjectViewportCentered(
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const float* position, const float* matrix, float* x, float* y, float* reciprocalDepth, float width, float height
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) {
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const float inverse = 1.0f / (((matrix[5] * position[1] + matrix[2] * position[0]) + matrix[8] * position[2]) + matrix[11]);
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*reciprocalDepth = inverse;
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*x = (((((matrix[3] * position[1] + matrix[0] * position[0]) + matrix[6] * position[2]) + matrix[9]) * inverse) * this->viewport.scaleX) + width * 0.5f;
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*y = (((((matrix[4] * position[1] + matrix[1] * position[0]) + matrix[7] * position[2]) + matrix[10]) * *reciprocalDepth) * this->viewport.scaleY) +
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height * 0.5f;
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return y;
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}
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