Java Matrix3.M20属性代码示例

public Matrix4 getMatrix(Matrix4 out) {
	out.val[Matrix4.M00] = basis.val[Matrix3.M00];
	out.val[Matrix4.M01] = basis.val[Matrix3.M01];
	out.val[Matrix4.M02] = basis.val[Matrix3.M02];
	out.val[Matrix4.M03] = origin.x;
	out.val[Matrix4.M10] = basis.val[Matrix3.M10];
	out.val[Matrix4.M11] = basis.val[Matrix3.M11];
	out.val[Matrix4.M12] = basis.val[Matrix3.M12];
	out.val[Matrix4.M13] = origin.y;
	out.val[Matrix4.M20] = basis.val[Matrix3.M20];
	out.val[Matrix4.M21] = basis.val[Matrix3.M21];
	out.val[Matrix4.M22] = basis.val[Matrix3.M22];
	out.val[Matrix4.M23] = origin.z;
	out.val[Matrix4.M30] = 0;
	out.val[Matrix4.M31] = 0;
	out.val[Matrix4.M32] = 0;
	out.val[Matrix4.M33] = 1;
	return out;
}
 

public static void getColumn (Matrix3 src, int col, Vector3 v) {
	if (col == 0) {
		v.x = src.val[Matrix3.M00];
		v.y = src.val[Matrix3.M10];
		v.z = src.val[Matrix3.M20];
	} else if (col == 1) {
		v.x = src.val[Matrix3.M01];
		v.y = src.val[Matrix3.M11];
		v.z = src.val[Matrix3.M21];
	} else if (col == 2) {
		v.x = src.val[Matrix3.M02];
		v.y = src.val[Matrix3.M12];
		v.z = src.val[Matrix3.M22];
	} else {
		throw new GdxRuntimeException("Invalid column");
	}
}
 

public static void setColumn (Matrix3 src, int col, Vector3 v) {
	if (col == 0) {
		src.val[Matrix3.M00] = v.x;
		src.val[Matrix3.M10] = v.y;
		src.val[Matrix3.M20] = v.z;
	} else if (col == 1) {
		src.val[Matrix3.M01] = v.x;
		src.val[Matrix3.M11] = v.y;
		src.val[Matrix3.M21] = v.z;
	} else if (col == 2) {
		src.val[Matrix3.M02] = v.x;
		src.val[Matrix3.M12] = v.y;
		src.val[Matrix3.M22] = v.z;
	} else {
		throw new GdxRuntimeException("Invalid column");
	}
}
 

public static void getRow (Matrix3 src, int row, Vector3 v) {
	if (row == 0) {
		v.x = src.val[Matrix3.M00];
		v.y = src.val[Matrix3.M01];
		v.z = src.val[Matrix3.M02];
	} else if (row == 1) {
		v.x = src.val[Matrix3.M10];
		v.y = src.val[Matrix3.M11];
		v.z = src.val[Matrix3.M12];
	} else if (row == 2) {
		v.x = src.val[Matrix3.M20];
		v.y = src.val[Matrix3.M21];
		v.z = src.val[Matrix3.M22];
	} else {
		throw new GdxRuntimeException("Invalid row");
	}
}
 

public static void setRow (Matrix3 src, int row, float x, float y, float z) {
	if (row == 0) {
		src.val[Matrix3.M00] = x;
		src.val[Matrix3.M01] = y;
		src.val[Matrix3.M02] = z;
	} else if (row == 1) {
		src.val[Matrix3.M10] = x;
		src.val[Matrix3.M11] = y;
		src.val[Matrix3.M12] = z;
	} else if (row == 2) {
		src.val[Matrix3.M20] = x;
		src.val[Matrix3.M21] = y;
		src.val[Matrix3.M22] = z;
	} else {
		throw new GdxRuntimeException("Invalid row");
	}
}
 

public static void setRotation (Matrix3 dest, Quaternion q) {
	float d = q.x * q.x + q.y * q.y + q.z * q.z + q.w * q.w;
	assert (d != 0f);
	float s = 2f / d;
	float xs = q.x * s, ys = q.y * s, zs = q.z * s;
	float wx = q.w * xs, wy = q.w * ys, wz = q.w * zs;
	float xx = q.x * xs, xy = q.x * ys, xz = q.x * zs;
	float yy = q.y * ys, yz = q.y * zs, zz = q.z * zs;
	dest.val[Matrix3.M00] = 1f - (yy + zz);
	dest.val[Matrix3.M01] = xy - wz;
	dest.val[Matrix3.M02] = xz + wy;
	dest.val[Matrix3.M10] = xy + wz;
	dest.val[Matrix3.M11] = 1f - (xx + zz);
	dest.val[Matrix3.M12] = yz - wx;
	dest.val[Matrix3.M20] = xz - wy;
	dest.val[Matrix3.M21] = yz + wx;
	dest.val[Matrix3.M22] = 1f - (xx + yy);
}
 

public void set(Matrix4 mat) {
	basis.val[Matrix3.M00] = mat.val[Matrix4.M00];
	basis.val[Matrix3.M01] = mat.val[Matrix4.M01];
	basis.val[Matrix3.M02] = mat.val[Matrix4.M02];
	basis.val[Matrix3.M10] = mat.val[Matrix4.M10];
	basis.val[Matrix3.M11] = mat.val[Matrix4.M11];
	basis.val[Matrix3.M12] = mat.val[Matrix4.M12];
	basis.val[Matrix3.M20] = mat.val[Matrix4.M20];
	basis.val[Matrix3.M21] = mat.val[Matrix4.M21];
	basis.val[Matrix3.M22] = mat.val[Matrix4.M22];
	origin.set(mat.val[Matrix4.M03], mat.val[Matrix4.M13], mat.val[Matrix4.M23]);
}
 

public static void add (Matrix3 a, Matrix3 b) {
	a.val[Matrix3.M00] += b.val[Matrix3.M00];
	a.val[Matrix3.M01] += b.val[Matrix3.M01];
	a.val[Matrix3.M02] += b.val[Matrix3.M02];
	a.val[Matrix3.M10] += b.val[Matrix3.M10];
	a.val[Matrix3.M11] += b.val[Matrix3.M11];
	a.val[Matrix3.M12] += b.val[Matrix3.M12];
	a.val[Matrix3.M20] += b.val[Matrix3.M20];
	a.val[Matrix3.M21] += b.val[Matrix3.M21];
	a.val[Matrix3.M22] += b.val[Matrix3.M22];
}
 

public static void scale (Matrix3 dest, Matrix3 mat, Vector3 s) {
	dest.val[Matrix3.M00] = mat.val[Matrix3.M00] * s.x;
	dest.val[Matrix3.M01] = mat.val[Matrix3.M01] * s.y;
	dest.val[Matrix3.M02] = mat.val[Matrix3.M02] * s.z;
	dest.val[Matrix3.M10] = mat.val[Matrix3.M10] * s.x;
	dest.val[Matrix3.M11] = mat.val[Matrix3.M11] * s.y;
	dest.val[Matrix3.M12] = mat.val[Matrix3.M12] * s.z;
	dest.val[Matrix3.M20] = mat.val[Matrix3.M20] * s.x;
	dest.val[Matrix3.M21] = mat.val[Matrix3.M21] * s.y;
	dest.val[Matrix3.M22] = mat.val[Matrix3.M22] * s.z;
}
 

public static void absolute (Matrix3 mat) {
	mat.val[Matrix3.M00] = Math.abs(mat.val[Matrix3.M00]);
	mat.val[Matrix3.M01] = Math.abs(mat.val[Matrix3.M01]);
	mat.val[Matrix3.M02] = Math.abs(mat.val[Matrix3.M02]);
	mat.val[Matrix3.M10] = Math.abs(mat.val[Matrix3.M10]);
	mat.val[Matrix3.M11] = Math.abs(mat.val[Matrix3.M11]);
	mat.val[Matrix3.M12] = Math.abs(mat.val[Matrix3.M12]);
	mat.val[Matrix3.M20] = Math.abs(mat.val[Matrix3.M20]);
	mat.val[Matrix3.M21] = Math.abs(mat.val[Matrix3.M21]);
	mat.val[Matrix3.M22] = Math.abs(mat.val[Matrix3.M22]);
}
 

public static void setFromOpenGLSubMatrix (Matrix3 mat, float[] m) {
	mat.val[Matrix3.M00] = m[0];
	mat.val[Matrix3.M01] = m[4];
	mat.val[Matrix3.M02] = m[8];
	mat.val[Matrix3.M10] = m[1];
	mat.val[Matrix3.M11] = m[5];
	mat.val[Matrix3.M12] = m[9];
	mat.val[Matrix3.M20] = m[2];
	mat.val[Matrix3.M21] = m[6];
	mat.val[Matrix3.M22] = m[10];
}
 

public static void getOpenGLSubMatrix (Matrix3 mat, float[] m) {
	m[0] = mat.val[Matrix3.M00];
	m[1] = mat.val[Matrix3.M10];
	m[2] = mat.val[Matrix3.M20];
	m[3] = 0f;
	m[4] = mat.val[Matrix3.M01];
	m[5] = mat.val[Matrix3.M11];
	m[6] = mat.val[Matrix3.M21];
	m[7] = 0f;
	m[8] = mat.val[Matrix3.M02];
	m[9] = mat.val[Matrix3.M12];
	m[10] = mat.val[Matrix3.M22];
	m[11] = 0f;
}
 

public static void invert (Matrix3 mat) {
	float co_x = cofac(mat, 1, 1, 2, 2);
	float co_y = cofac(mat, 1, 2, 2, 0);
	float co_z = cofac(mat, 1, 0, 2, 1);

	float det = mat.val[Matrix3.M00] * co_x + mat.val[Matrix3.M01] * co_y + mat.val[Matrix3.M02] * co_z;
	assert (det != 0f);

	float s = 1f / det;
	float m00 = co_x * s;
	float m01 = cofac(mat, 0, 2, 2, 1) * s;
	float m02 = cofac(mat, 0, 1, 1, 2) * s;
	float m10 = co_y * s;
	float m11 = cofac(mat, 0, 0, 2, 2) * s;
	float m12 = cofac(mat, 0, 2, 1, 0) * s;
	float m20 = co_z * s;
	float m21 = cofac(mat, 0, 1, 2, 0) * s;
	float m22 = cofac(mat, 0, 0, 1, 1) * s;

	mat.val[Matrix3.M00] = m00;
	mat.val[Matrix3.M01] = m01;
	mat.val[Matrix3.M02] = m02;
	mat.val[Matrix3.M10] = m10;
	mat.val[Matrix3.M11] = m11;
	mat.val[Matrix3.M12] = m12;
	mat.val[Matrix3.M20] = m20;
	mat.val[Matrix3.M21] = m21;
	mat.val[Matrix3.M22] = m22;
}
 

public static void transformAabb (Vector3 halfExtents, float margin, Transform t, Vector3 aabbMinOut, Vector3 aabbMaxOut) {
	Stack stack = Stack.enter();
	Vector3 halfExtentsWithMargin = stack.allocVector3();
	halfExtentsWithMargin.x = halfExtents.x + margin;
	halfExtentsWithMargin.y = halfExtents.y + margin;
	halfExtentsWithMargin.z = halfExtents.z + margin;

	Matrix3 abs_b = stack.alloc(t.basis);
	MatrixUtil.absolute(abs_b);

	Vector3 tmp = stack.allocVector3();

	Vector3 center = stack.alloc(t.origin);
	Vector3 extent = stack.allocVector3();
	tmp.x = abs_b.val[Matrix3.M00];
	tmp.y = abs_b.val[Matrix3.M01];
	tmp.z = abs_b.val[Matrix3.M02];
	extent.x = tmp.dot(halfExtentsWithMargin);
	tmp.x = abs_b.val[Matrix3.M10];
	tmp.y = abs_b.val[Matrix3.M11];
	tmp.z = abs_b.val[Matrix3.M12];
	extent.y = tmp.dot(halfExtentsWithMargin);
	tmp.x = abs_b.val[Matrix3.M20];
	tmp.y = abs_b.val[Matrix3.M21];
	tmp.z = abs_b.val[Matrix3.M22];
	extent.z = tmp.dot(halfExtentsWithMargin);

	aabbMinOut.set(center).sub(extent);
	aabbMaxOut.set(center).add(extent);
	stack.leave();
}
 

/** getAabb's default implementation is brute force, expected derived classes to implement a fast dedicated version. */
@Override
public void getAabb (Transform trans, Vector3 aabbMin, Vector3 aabbMax) {
	Stack stack = Stack.enter();
	Vector3 localHalfExtents = stack.allocVector3();
	localHalfExtents.set(localAabbMax).sub(localAabbMin);
	localHalfExtents.scl(0.5f);
	localHalfExtents.x += getMargin();
	localHalfExtents.y += getMargin();
	localHalfExtents.z += getMargin();

	Vector3 localCenter = stack.allocVector3();
	localCenter.set(localAabbMax).add(localAabbMin);
	localCenter.scl(0.5f);

	Matrix3 abs_b = stack.alloc(trans.basis);
	MatrixUtil.absolute(abs_b);

	Vector3 center = stack.alloc(localCenter);
	trans.transform(center);

	Vector3 tmp = stack.allocVector3();

	Vector3 extent = stack.allocVector3();
	tmp.x = abs_b.val[Matrix3.M00];
	tmp.y = abs_b.val[Matrix3.M01];
	tmp.z = abs_b.val[Matrix3.M02];
	extent.x = tmp.dot(localHalfExtents);
	tmp.x = abs_b.val[Matrix3.M10];
	tmp.y = abs_b.val[Matrix3.M11];
	tmp.z = abs_b.val[Matrix3.M12];
	extent.y = tmp.dot(localHalfExtents);
	tmp.x = abs_b.val[Matrix3.M20];
	tmp.y = abs_b.val[Matrix3.M21];
	tmp.z = abs_b.val[Matrix3.M22];
	extent.z = tmp.dot(localHalfExtents);

	aabbMin.set(center).sub(extent);
	aabbMax.set(center).add(extent);
	stack.leave();
}