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matrixMath.c
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matrixMath.c
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#include "matrixMath.h"
#include <cmath>
matrix matScale(matrix mat, double factor)
{
for (int i = 0; i < mat.size(); i++)
for (int j = 0; j < mat[i].size(); j++)
mat[i][j] *= factor;
return mat;
}
matrix matMul(matrix mat1, matrix mat2)
{
if (mat1[0].size() != mat2.size())
throw "Worng Matrecies Size";
matrix result = {{0, 0, 0}, {0, 0, 0}, {0, 0, 0}};
for (int i = 0; i < mat1.size(); ++i)
{
for (int j = 0; j < mat2[0].size(); ++j)
{
for (int k = 0; k < mat1[0].size(); ++k)
{
result[i][j] += mat1[i][k] * mat2[k][j]; //use std::insert i guess
}
}
}
return result;
}
matrix matMove(matrix mat, double x, double y, double z)
{
for (int i = 0; i < mat.size(); i++)
{
mat[i][0] += x;
mat[i][1] += y;
mat[i][2] += z;
}
return mat;
}
void rotateX(matrix &point, double angle)
{
matrix rotationMatrixX = {
{1, 0, 0},
{0, cos(angle), -sin(angle)},
{0, sin(angle), cos(angle)}};
point = matMul(rotationMatrixX, point);
}
void rotateY(matrix &point, double angle)
{
matrix rotationMatrixY = {
{cos(angle), 0, sin(angle)},
{0, 1, 0},
{-sin(angle), 0, cos(angle)}};
point = matMul(rotationMatrixY, point);
}
void rotateZ(matrix &point, double angle)
{
matrix rotationMatrixZ = {
{cos(angle), -sin(angle), 0},
{sin(angle), cos(angle), 0},
{0, 0, 1}};
point = matMul(rotationMatrixZ, point);
}
void project(matrix &point, double distance)
{
double w = 1 / (distance - point[2][0]);
matrix projectionMatrix =
{{{w, 0, 0},
{0, w, 0}}};
point = matMul(projectionMatrix, point);
}