a47d20f8be
Administrative source import: native x86 compilation passed for 423 authored units. Source placement and submission states are migrated separately; this commit does not imply peer acceptance.
Previous head: 35d2a8cb36
Payload SHA256: 592f016d2730c5593bb653aa054c1e5f76a6df72c8f5a09e66f74876e2e33dee
40 lines
1.4 KiB
C++
40 lines
1.4 KiB
C++
#include "Render/Projection/RenderProjection.h"
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#include <bit>
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#include <cmath>
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#include <cstring>
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namespace {
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float InverseLength(float squared) {
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const float length = std::sqrt(squared);
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return 1.0f / length;
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}
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}
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// OFFSET: 0x0055A090
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// FUNCTION: fn_02076
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void RenderProjection::Ray(int x, int y, const float* origin, const float* matrix, float* output) const {
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float transform[12];
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std::memcpy(transform, matrix, sizeof(transform));
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const float horizontal = static_cast<float>(x) / static_cast<float>(this->centerX);
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output[0] = origin[0];
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output[1] = origin[1];
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output[2] = origin[2];
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const float vertical = 1.0f - static_cast<float>(y) / static_cast<float>(this->centerY);
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const float negative = -vertical;
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const float dy = (static_cast<float>(this->centerY) * negative) / this->scaleY;
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const float dx = (static_cast<float>(this->centerX) * (horizontal - 1.0f)) / this->scaleX;
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const float first = ((dy * transform[3] + dx * transform[0]) + transform[6]) + 0.0f;
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output[3] = first;
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const float second = ((dx * transform[1] + dy * transform[4]) + transform[7]) + 0.0f;
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output[4] = second;
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const float third = ((transform[5] * dy + dx * transform[2]) + transform[8]) + 0.0f;
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output[5] = third;
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const float inverse = InverseLength((second * second + first * first) + third * third);
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output[3] = inverse * output[3];
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const float last = inverse * output[5];
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output[4] = inverse * output[4];
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output[5] = last;
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}
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