a098f98357
Batch #15435 by youko: 0 byte-identical, 1 confirmed by peer review. - fn_02019 Intersects: logic confirmed by peer review Peer-reviewed-by: ragnarok-clanker, alisonrag, Toshiro Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
76 lines
2 KiB
C++
76 lines
2 KiB
C++
#include "Contents/Models/ModelActor.h"
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#include <cmath>
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namespace {
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// INLINED
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float Absolute(float value) {
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return std::fabs(value);
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}
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// INLINED
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__forceinline int ClipSlab(const float* ray, const float* delta, const float* direction, float radius, float& near, float& far) {
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const float distance = (delta[1] * direction[1] + delta[0] * direction[0]) + delta[2] * direction[2];
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const float along = (ray[3] * direction[0] + ray[4] * direction[1]) + ray[5] * direction[2];
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if (Absolute(along) > 0.00001f) {
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const float inverse = 1.0f / along;
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const float first = (radius + distance) * inverse;
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const float second = (distance - radius) * inverse;
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if (first > second) {
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near = second > near ? second : near;
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far = first < far ? first : far;
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} else {
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near = first > near ? first : near;
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far = second < far ? second : far;
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}
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if (near > far || far < 0.0f) {
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return 0;
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}
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} else if (-distance - radius > 0.0f || radius - distance < 0.0f) {
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return 0;
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}
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return 1;
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}
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}
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// OFFSET: 0x00553850
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// FUNCTION: fn_02019
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__declspec(noinline) int Intersects(const float* ray, const OrientedBounds& bounds) {
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const float delta[3] = {bounds.center[0] - ray[0], bounds.center[1] - ray[1], bounds.center[2] - ray[2]};
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float near = -999999.0f;
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float far = 999999.0f;
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if (!ClipSlab(ray, delta, bounds.axes[0], bounds.halfSize[0], near, far)) {
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return 0;
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}
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if (!ClipSlab(ray, delta, bounds.axes[1], bounds.halfSize[1], near, far)) {
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return 0;
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}
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if (!ClipSlab(ray, delta, bounds.axes[2], bounds.halfSize[2], near, far)) {
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return 0;
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}
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if (near > 0.0f) {
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if (near > ray[6]) {
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return 0;
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}
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} else if (far > ray[6]) {
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return 0;
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}
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return 1;
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}
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// OFFSET: 0x00AB7810
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// FUNCTION: fn_17487
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void C3dActor::MarkOccluded(const float* ray) {
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if (this->occlusionEnabled == 1 && Intersects(ray, this->oriented)) {
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this->occluded = 1;
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}
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}
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