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
38 lines
1.2 KiB
C++
38 lines
1.2 KiB
C++
#include "Contents/Ground/TerrainHeight.h"
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#include "Utility/Math/RayTriangle.h"
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// OFFSET: 0x00749300
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// FUNCTION: fn_07842
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float TerrainHeight::RayDistance(const float* ray, int column, int row) const {
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const TerrainHeightCell* cell = this->CellAt(column, row);
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if (!cell) {
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return 0.0f;
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}
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const float size = static_cast<float>(this->cellSize);
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const int x = column - this->width / 2;
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const int z = row - this->height / 2;
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const float left = static_cast<float>(x) * size;
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const float right = static_cast<float>(x + 1) * size;
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const float top = static_cast<float>(z) * size;
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const float bottom = static_cast<float>(z + 1) * size;
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const float first[3] = {left, cell->heights[0], top};
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const float second[3] = {right, cell->heights[1], top};
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const float third[3] = {left, cell->heights[2], bottom};
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const float fourth[3] = {right, cell->heights[3], bottom};
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float nearest = 999999.0f;
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float u;
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float v;
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float distance;
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if (IntersectRayTriangle(ray, first, second, third, u, v, distance)) {
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nearest = distance < nearest ? distance : nearest;
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}
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if (IntersectRayTriangle(ray, second, fourth, third, u, v, distance)) {
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nearest = distance < nearest ? distance : nearest;
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}
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return nearest;
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}
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