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//#pragma comment(linker, "/SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup")
#include <GL/freeglut/freeglut.h>
#include <stdio.h>
#define WIDTH 100
#define HEIGHT 50
//マトリクス構造体
struct MATRIX {
union {
struct {
float _11, _12, _13, _14;
float _21, _22, _23, _24;
float _31, _32, _33, _34;
float _41, _42, _43, _44;
};
float mat_4x4[4][4];
float mat_16[16];
};
MATRIX(){//単位行列に初期化
for(int i=0;i<16;i++){
this->mat_16[i]=0;
}
this->_11=this->_22=this->_33=this->_44=1;
}
void PRINT(char* text){
printf("%s\n%f,%f,%f,%f\n%f,%f,%f,%f\n%f,%f,%f,%f\n%f,%f,%f,%f\n\n",
text,
this->_11,this->_21,this->_31,this->_41,
this->_12,this->_22,this->_32,this->_42,
this->_13,this->_23,this->_33,this->_43,
this->_14,this->_24,this->_34,this->_44);
}
};
//4つのベクトル
struct Vector4f{
union {
struct {
float x;
float y;
float z;
float w;
};
float Index[4];
};
Vector4f(){};
Vector4f(float _x,float _y,float _z,float _w){
x=_x;y=_y;z=_z;w=_w;
};
Vector4f GeometricTransform(MATRIX& mat);//幾何変換
void PRINT(char* text){
printf("%s\n%f,%f,%f,%f\n\n",text,this->x,this->y,this->z,this->w);
}
}vec4d;
Vector4f Vector4f::GeometricTransform(MATRIX &mat){
Vector4f ret;
for(int y=0;y<4;y++){
ret.Index[y]=mat.mat_16[y]*this->x+mat.mat_16[y+4]*this->y+mat.mat_16[y+8]*this->z+mat.mat_16[y+12]*this->w;
}
return ret;
}
void display(void)
{
}
void Init(){
Vector4f test;
test.x=3.0f;
test.y=1.0f;
test.z=5.0f;
test.w=1.0f;
test.PRINT("同次座標を設定");
MATRIX mat;
mat._41=4.0f;
mat._42=8.0f;
mat._43=2.0f;
mat.PRINT("適当に作成した平行移動行列");
Vector4f ret=test.GeometricTransform(mat);
ret.PRINT("積を行った結果");
}
int main(int argc, char *argv[])
{
glutInitWindowPosition(100, 100);
glutInitWindowSize(WIDTH, HEIGHT);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
glutCreateWindow("同次座標で計算");
glutDisplayFunc(display);
Init();
glutMainLoop();
return 0;
}
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