File	Doc	Category	Size	Date	Package
Matrix3f.java	API Doc	Android 5.1 API	8288	Thu Mar 12 22:22:56 GMT 2015	android.support.v8.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.support.v8.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.support.v8.renderscript.Matrix3f lhs, android.support.v8.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.support.v8.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; } }