C++ (Cpp) MATRIX::Identity Examples

Example #1

File: math.cpp Project: ponycalypsenow/oldies

void MATRIX::Scale(VECTOR v){
	MATRIX swp;
	swp.Identity();
	swp.m[0][0]=v.x;
	swp.m[1][1]=v.y;
	swp.m[2][2]=v.z;
	*this=*this*swp;
}

Example #2

File: math.cpp Project: ponycalypsenow/oldies

void MATRIX::Translate(VECTOR v){
	MATRIX swp;
	swp.Identity();
	swp.m[3][0]=v.x;
	swp.m[3][1]=v.y;
	swp.m[3][2]=v.z;
	*this=*this*swp;
}

Example #3

File: math.cpp Project: ponycalypsenow/oldies

static MATRIX RotateZ(float a){
	float cosinus=cosf(a);
	float sinus=sinf(a);
	MATRIX ret;
	ret.Identity();
	ret.m[0][0]=cosinus;
	ret.m[1][1]=cosinus;
	ret.m[0][1]=-sinus;
	ret.m[1][0]=sinus;
	return ret;
}

Example #4

File: math.cpp Project: ponycalypsenow/oldies

void MATRIX::Target(VECTOR v,VECTOR c,float a){
	VECTOR u(0,1,0);
	VECTOR z=v-c;z.Normalize();
	VECTOR y=u-z*Dot(u,z);y.Normalize();
	VECTOR x=Cross(y,z);
	MATRIX swp;
	swp.Identity();
	swp.m[0][0]=x.x,swp.m[0][1]=y.x,swp.m[0][2]=z.x;
	swp.m[1][0]=x.y,swp.m[1][1]=y.y,swp.m[1][2]=z.y;
	swp.m[2][0]=x.z,swp.m[2][1]=y.z,swp.m[2][2]=z.z;
	swp.m[3][0]=-Dot(c,x);
	swp.m[3][1]=-Dot(c,y);
	swp.m[3][2]=-Dot(c,z);
	*this=RotateZ(-a)*swp;
}