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Diffstat (limited to 'graphics/java/android/renderscript/Matrix4f.java')
-rw-r--r-- | graphics/java/android/renderscript/Matrix4f.java | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/graphics/java/android/renderscript/Matrix4f.java b/graphics/java/android/renderscript/Matrix4f.java new file mode 100644 index 0000000..ebd5bde --- /dev/null +++ b/graphics/java/android/renderscript/Matrix4f.java @@ -0,0 +1,189 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package android.renderscript; + +import java.lang.Math; +import android.util.Log; + + +/** + * @hide + * + **/ +public class Matrix4f { + + public Matrix4f() { + mMat = new float[16]; + loadIdentity(); + } + + public float get(int i, int j) { + return mMat[i*4 + j]; + } + + public void set(int i, int j, float v) { + mMat[i*4 + j] = v; + } + + public void loadIdentity() { + mMat[0] = 1; + mMat[1] = 0; + mMat[2] = 0; + mMat[3] = 0; + + mMat[4] = 0; + mMat[5] = 1; + mMat[6] = 0; + mMat[7] = 0; + + mMat[8] = 0; + mMat[9] = 0; + mMat[10] = 1; + mMat[11] = 0; + + mMat[12] = 0; + mMat[13] = 0; + mMat[14] = 0; + mMat[15] = 1; + } + + public void load(Matrix4f src) { + System.arraycopy(mMat, 0, src, 0, 16); + } + + public void loadRotate(float rot, float x, float y, float z) { + float c, s; + mMat[3] = 0; + mMat[7] = 0; + mMat[11]= 0; + mMat[12]= 0; + mMat[13]= 0; + mMat[14]= 0; + mMat[15]= 1; + 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[ 4] = xy*nc - zs; + mMat[ 8] = zx*nc + ys; + mMat[ 1] = xy*nc + zs; + mMat[ 5] = y*y*nc + c; + mMat[ 9] = yz*nc - xs; + mMat[ 2] = zx*nc - ys; + mMat[ 6] = yz*nc + xs; + mMat[10] = z*z*nc + c; + } + + public void loadScale(float x, float y, float z) { + loadIdentity(); + mMat[0] = x; + mMat[5] = y; + mMat[10] = z; + } + + public void loadTranslate(float x, float y, float z) { + loadIdentity(); + mMat[12] = x; + mMat[13] = y; + mMat[14] = z; + } + + public void loadMultiply(Matrix4f lhs, Matrix4f rhs) { + for (int i=0 ; i<4 ; i++) { + float ri0 = 0; + float ri1 = 0; + float ri2 = 0; + float ri3 = 0; + for (int j=0 ; j<4 ; 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; + ri3 += lhs.get(j,3) * rhs_ij; + } + set(i,0, ri0); + set(i,1, ri1); + set(i,2, ri2); + set(i,3, ri3); + } + } + + public void loadOrtho(float l, float r, float b, float t, float n, float f) { + loadIdentity(); + mMat[0] = 2 / (r - l); + mMat[5] = 2 / (t - b); + mMat[10]= -2 / (f - n); + mMat[12]= -(r + l) / (r - l); + mMat[13]= -(t + b) / (t - b); + mMat[14]= -(f + n) / (f - n); + } + + public void loadFrustum(float l, float r, float b, float t, float n, float f) { + loadIdentity(); + mMat[0] = 2 * n / (r - l); + mMat[5] = 2 * n / (t - b); + mMat[8] = (r + l) / (r - l); + mMat[9] = (t + b) / (t - b); + mMat[10]= -(f + n) / (f - n); + mMat[11]= -1; + mMat[14]= -2*f*n / (f - n); + mMat[15]= 0; + } + + public void multiply(Matrix4f rhs) { + Matrix4f tmp = new Matrix4f(); + tmp.loadMultiply(this, rhs); + load(tmp); + } + public void rotate(float rot, float x, float y, float z) { + Matrix4f tmp = new Matrix4f(); + tmp.loadRotate(rot, x, y, z); + multiply(tmp); + } + public void scale(float x, float y, float z) { + Matrix4f tmp = new Matrix4f(); + tmp.loadScale(x, y, z); + multiply(tmp); + } + public void translate(float x, float y, float z) { + Matrix4f tmp = new Matrix4f(); + tmp.loadTranslate(x, y, z); + multiply(tmp); + } + + final float[] mMat; +} + + + + + |