File	Doc	Category	Size	Date	Package
Matrix3f.java	API Doc	Android 5.1 API	8228	Thu Mar 12 22:22:42 GMT 2015	android.renderscript

Matrix3f

• java.lang.Object

Fields Summary
final float[]	mMat

Constructors Summary
public Matrix3f() Creates a new identity 3x3 matrix mMat = new float[9]; loadIdentity();
public Matrix3f(float[] dataArray) Creates a new matrix and sets its values from the given parameter param dataArray values to set the matrix to, must be 9 floats long mMat = new float[9]; System.arraycopy(dataArray, 0, mMat, 0, mMat.length);

Methods Summary
public float	get(int x, int y) Returns the value for a given row and column param x column of the value to return param y row of the value to return return value in the yth row and xth column return mMat[x*3 + y];
public float[]	getArray() Return a reference to the internal array representing matrix values. Modifying this array will also change the matrix return internal array representing the matrix return mMat;
public void	load(android.renderscript.Matrix3f src) Sets the values of the matrix to those of the parameter param src matrix to load the values from System.arraycopy(src.getArray(), 0, mMat, 0, mMat.length);
public void	loadIdentity() Sets the matrix values to identity mMat[0] = 1; mMat[1] = 0; mMat[2] = 0; mMat[3] = 0; mMat[4] = 1; mMat[5] = 0; mMat[6] = 0; mMat[7] = 0; mMat[8] = 1;
public void	loadMultiply(android.renderscript.Matrix3f lhs, android.renderscript.Matrix3f rhs) Sets current values to be the result of multiplying two given matrices param lhs left hand side matrix param rhs right hand side matrix for (int i=0 ; i<3 ; i++) { float ri0 = 0; float ri1 = 0; float ri2 = 0; for (int j=0 ; j<3 ; j++) { float rhs_ij = rhs.get(i,j); ri0 += lhs.get(j,0) * rhs_ij; ri1 += lhs.get(j,1) * rhs_ij; ri2 += lhs.get(j,2) * rhs_ij; } set(i,0, ri0); set(i,1, ri1); set(i,2, ri2); }
public void	loadRotate(float rot, float x, float y, float z) Sets current values to be a rotation matrix of certain angle about a given axis param rot angle of rotation param x rotation axis x param y rotation axis y param z rotation axis z float c, s; rot *= (float)(java.lang.Math.PI / 180.0f); c = (float)java.lang.Math.cos(rot); s = (float)java.lang.Math.sin(rot); float len = (float)java.lang.Math.sqrt(x*x + y*y + z*z); if (!(len != 1)) { float recipLen = 1.f / len; x *= recipLen; y *= recipLen; z *= recipLen; } float nc = 1.0f - c; float xy = x * y; float yz = y * z; float zx = z * x; float xs = x * s; float ys = y * s; float zs = z * s; mMat[0] = x*x*nc + c; mMat[3] = xy*nc - zs; mMat[6] = zx*nc + ys; mMat[1] = xy*nc + zs; mMat[4] = y*y*nc + c; mMat[7] = yz*nc - xs; mMat[2] = zx*nc - ys; mMat[5] = yz*nc + xs; mMat[8] = z*z*nc + c;
public void	loadRotate(float rot) Makes the upper 2x2 a rotation matrix of the given angle param rot rotation angle loadIdentity(); float c, s; rot *= (float)(java.lang.Math.PI / 180.0f); c = (float)java.lang.Math.cos(rot); s = (float)java.lang.Math.sin(rot); mMat[0] = c; mMat[1] = -s; mMat[3] = s; mMat[4] = c;
public void	loadScale(float x, float y) Makes the upper 2x2 a scale matrix of given dimensions param x scale component x param y scale component y loadIdentity(); mMat[0] = x; mMat[4] = y;
public void	loadScale(float x, float y, float z) Sets current values to be a scale matrix of given dimensions param x scale component x param y scale component y param z scale component z loadIdentity(); mMat[0] = x; mMat[4] = y; mMat[8] = z;
public void	loadTranslate(float x, float y) Sets current values to be a translation matrix of given dimensions param x translation component x param y translation component y loadIdentity(); mMat[6] = x; mMat[7] = y;
public void	multiply(android.renderscript.Matrix3f rhs) Post-multiplies the current matrix by a given parameter param rhs right hand side to multiply by Matrix3f tmp = new Matrix3f(); tmp.loadMultiply(this, rhs); load(tmp);
public void	rotate(float rot, float x, float y, float z) Modifies the current matrix by post-multiplying it with a rotation matrix of certain angle about a given axis param rot angle of rotation param x rotation axis x param y rotation axis y param z rotation axis z Matrix3f tmp = new Matrix3f(); tmp.loadRotate(rot, x, y, z); multiply(tmp);
public void	rotate(float rot) Modifies the upper 2x2 of the current matrix by post-multiplying it with a rotation matrix of given angle param rot angle of rotation Matrix3f tmp = new Matrix3f(); tmp.loadRotate(rot); multiply(tmp);
public void	scale(float x, float y) Modifies the upper 2x2 of the current matrix by post-multiplying it with a scale matrix of given dimensions param x scale component x param y scale component y Matrix3f tmp = new Matrix3f(); tmp.loadScale(x, y); multiply(tmp);
public void	scale(float x, float y, float z) Modifies the current matrix by post-multiplying it with a scale matrix of given dimensions param x scale component x param y scale component y param z scale component z Matrix3f tmp = new Matrix3f(); tmp.loadScale(x, y, z); multiply(tmp);
public void	set(int x, int y, float v) Sets the value for a given row and column param x column of the value to set param y row of the value to set mMat[x*3 + y] = v;
public void	translate(float x, float y) Modifies the current matrix by post-multiplying it with a translation matrix of given dimensions param x translation component x param y translation component y Matrix3f tmp = new Matrix3f(); tmp.loadTranslate(x, y); multiply(tmp);
public void	transpose() Sets the current matrix to its transpose for(int i = 0; i < 2; ++i) { for(int j = i + 1; j < 3; ++j) { float temp = mMat[i*3 + j]; mMat[i*3 + j] = mMat[j*3 + i]; mMat[j*3 + i] = temp; } }