dbeb2d7edd
Batch #16323 by youko: 0 byte-identical, 1 confirmed by peer review. - fn_07842 C3dAttr::RayDistance: logic confirmed by peer review Peer-reviewed-by: eAthena, Yommy, Toshiro Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#include "Resource/World/TerrainResource.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 C3dAttr::RayDistance(const float* ray, int column, int row) const {
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float nearest = 999999.0f;
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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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struct Point {
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// INLINED
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Point() : x(0), y(0), z(0) {
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}
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float x;
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float y;
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float z;
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};
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Point corners[4];
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const float size = static_cast<float>(this->cellSize);
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const int dx = column - this->width / 2;
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const int dz = row - this->height / 2;
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const float left = static_cast<float>(dx) * size;
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const float right = static_cast<float>(dx + 1) * size;
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const float top = static_cast<float>(dz) * size;
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const float bottom = static_cast<float>(dz + 1) * size;
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corners[0].x = left;
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corners[0].y = cell->heights[0];
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corners[0].z = top;
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corners[1].x = right;
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corners[1].y = cell->heights[1];
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corners[1].z = top;
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corners[2].x = left;
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corners[2].y = cell->heights[2];
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corners[2].z = bottom;
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corners[3].x = right;
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corners[3].y = cell->heights[3];
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corners[3].z = bottom;
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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, &corners[0].x, &corners[1].x, &corners[2].x, u, v, distance)) {
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nearest = distance < nearest ? distance : nearest;
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}
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if (IntersectRayTriangle(ray, &corners[1].x, &corners[3].x, &corners[2].x, 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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