65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#include "Utility/AffineMatrix.h"
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#include <bit>
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#include <cmath>
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float ClientSin(float radians) {
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return std::sin(radians);
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}
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float ClientCos(float radians) {
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return std::cos(radians);
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}
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namespace {
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// OFFSET: 0x00554280
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// FUNCTION: fn_02021
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// The six adjacent arrays are one contiguous addressing domain: negative lookup indices intentionally reach
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// the preceding array's tail, not abs(index) in the negative array.
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struct AngleTables {
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float radians[361];
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float negativeRadians[361];
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float sine[361];
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float negativeSine[361];
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float cosine[361];
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float negativeCosine[361];
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AngleTables() {
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for (int index = 0; index <= 360; ++index) {
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const float angle = (static_cast<float>(index) / 180.0f) * 3.141592f;
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radians[index] = angle;
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sine[index] = ClientSin(angle);
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cosine[index] = ClientCos(angle);
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negativeRadians[index] = -angle;
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negativeSine[index] = -sine[index];
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negativeCosine[index] = -cosine[index];
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}
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}
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};
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const AngleTables tables;
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int Wrapped(int degrees) {
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return degrees > 360 || degrees < -360 ? degrees % 360 : degrees;
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}
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}
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// OFFSET: 0x00554420
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// FUNCTION: fn_02024
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float ClientRadians(int degrees) {
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const int index = Wrapped(degrees);
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return tables.radians[index >= 0 ? index : 361 + index];
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}
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// OFFSET: 0x00554470
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// FUNCTION: fn_02025
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float ClientSine(int degrees) {
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const int index = Wrapped(degrees);
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return tables.sine[index >= 0 ? index : 361 + index];
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}
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// OFFSET: 0x005543D0
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// FUNCTION: fn_02023
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float ClientCosine(int degrees) {
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const int index = Wrapped(degrees);
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return tables.cosine[index >= 0 ? index : 361 + index];
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}
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