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package com.android.noisefield;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.renderscript.Allocation;
import android.renderscript.Float3;
import android.renderscript.Float4;
import android.renderscript.Matrix4f;
import android.renderscript.Mesh;
import android.renderscript.Program;
import android.renderscript.ProgramFragment;
import android.renderscript.ProgramFragmentFixedFunction;
import android.renderscript.ProgramRaster;
import android.renderscript.ProgramStore;
import android.renderscript.ProgramVertex;
import android.renderscript.ProgramVertexFixedFunction;
import android.renderscript.RenderScriptGL;
import android.renderscript.Sampler;
import android.renderscript.Mesh.Primitive;
import android.renderscript.ProgramStore.BlendDstFunc;
import android.renderscript.ProgramStore.BlendSrcFunc;
import android.os.Bundle;
import android.app.WallpaperManager;
import android.util.Log;
import android.view.MotionEvent;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
public class NoiseFieldRS {
public static String LOG_TAG = "NoiseField";
private Resources mRes;
private RenderScriptGL mRS;
private ScriptC_noisefield mScript;
private int mHeight;
private int mWidth;
private boolean mTouchDown;
private final BitmapFactory.Options mOptionsARGB = new BitmapFactory.Options();
private ScriptField_VpConsts mPvConsts;
private Allocation mDotAllocation;
private ScriptField_VertexColor_s mVertexColors;
private ScriptField_Particle mDotParticles;
private Mesh mDotMesh;
private int mDensityDPI;
public void init(int dpi, RenderScriptGL rs,
Resources res, int width, int height) {
mDensityDPI = dpi;
mRS = rs;
mRes = res;
mWidth = width;
mHeight = height;
mOptionsARGB.inScaled = false;
mOptionsARGB.inPreferredConfig = Bitmap.Config.ARGB_8888;
Mesh.AllocationBuilder smb2 = new Mesh.AllocationBuilder(mRS);
mDotParticles = new ScriptField_Particle(mRS, 83);
smb2.addVertexAllocation(mDotParticles.getAllocation());
smb2.addIndexSetType(Mesh.Primitive.POINT);
mScript = new ScriptC_noisefield(mRS, mRes, R.raw.noisefield);
mDotMesh = smb2.create();
mScript.set_dotMesh(mDotMesh);
mScript.bind_dotParticles(mDotParticles);
mPvConsts = new ScriptField_VpConsts(mRS, 1);
createProgramVertex();
createProgramRaster();
createProgramFragmentStore();
createProgramFragment();
createBackgroundMesh();
loadTextures();
mScript.set_densityDPI(mDensityDPI);
mScript.invoke_positionParticles();
}
private Matrix4f getProjectionNormalized(int w, int h) {
// range -1,1 in the narrow axis at z = 0.
Matrix4f m1 = new Matrix4f();
Matrix4f m2 = new Matrix4f();
if (w > h) {
float aspect = ((float) w) / h;
m1.loadFrustum(-aspect, aspect, -1, 1, 1, 100);
} else {
float aspect = ((float) h) / w;
m1.loadFrustum(-0.5f, 1, -aspect, aspect, 1, 100);
}
m2.loadRotate(180, 0, 1, 0);
m1.loadMultiply(m1, m2);
m2.loadScale(-1, 1, 1);
m1.loadMultiply(m1, m2);
m2.loadTranslate(0, 0, 1);
m1.loadMultiply(m1, m2);
return m1;
}
private void updateProjectionMatrices() {
Matrix4f projNorm = getProjectionNormalized(mWidth, mHeight);
ScriptField_VpConsts.Item i = new ScriptField_VpConsts.Item();
i.MVP = projNorm;
i.scaleSize = mDensityDPI/240.0f;
mPvConsts.set(i, 0, true);
}
private void createBackgroundMesh() {
// The composition and colors of the background mesh were plotted on paper and photoshop
// first then translated to the csv file in raw. Points and colors are not random.
ArrayList<String> meshData = new ArrayList<String>();
InputStream inputStream = mRes.openRawResource(R.raw.bgmesh);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
try {
String line;
while ((line = reader.readLine()) != null) {
meshData.add(line);
}
} catch (IOException e) {
Log.e(LOG_TAG, "Unable to load background mesh from csv file.");
} finally {
try {
inputStream.close();
} catch (IOException e) {
Log.e(LOG_TAG, "Unable to close background mesh csv file.");
}
}
int meshDataSize = meshData.size();
mVertexColors = new ScriptField_VertexColor_s(mRS, meshDataSize);
for (int i=0; i<meshDataSize; i++) {
String line = (String) meshData.get(i);
String[] values = line.split(",");
float xPos = Float.parseFloat(values[0]);
float yPos = Float.parseFloat(values[1]);
float red = Float.parseFloat(values[2]);
float green = Float.parseFloat(values[3]);
float blue = Float.parseFloat(values[4]);
mVertexColors.set_position(i, new Float3(xPos, yPos, 0.0f), false);
mVertexColors.set_color(i, new Float4(red, green, blue, 1.0f), false);
}
mVertexColors.copyAll();
Mesh.AllocationBuilder backgroundBuilder = new Mesh.AllocationBuilder(mRS);
backgroundBuilder.addIndexSetType(Primitive.TRIANGLE);
backgroundBuilder.addVertexAllocation(mVertexColors.getAllocation());
mScript.set_gBackgroundMesh(backgroundBuilder.create());
mScript.bind_vertexColors(mVertexColors);
}
private Allocation loadTexture(int id) {
final Allocation allocation = Allocation.createFromBitmapResource(mRS, mRes, id);
return allocation;
}
private void loadTextures() {
mDotAllocation = loadTexture(R.drawable.dot);
mScript.set_textureDot(mDotAllocation);
}
private void createProgramVertex() {
ProgramVertex.Builder backgroundBuilder = new ProgramVertex.Builder(mRS);
backgroundBuilder.setShader(mRes, R.raw.bg_vs);
backgroundBuilder.addInput(ScriptField_VertexColor_s.createElement(mRS));
ProgramVertex programVertexBackground = backgroundBuilder.create();
mScript.set_vertBg(programVertexBackground);
updateProjectionMatrices();
ProgramVertex.Builder builder = new ProgramVertex.Builder(mRS);
builder = new ProgramVertex.Builder(mRS);
builder.setShader(mRes, R.raw.noisefield_vs);
builder.addConstant(mPvConsts.getType());
builder.addInput(mDotMesh.getVertexAllocation(0).getType().getElement());
ProgramVertex pvs = builder.create();
pvs.bindConstants(mPvConsts.getAllocation(), 0);
mRS.bindProgramVertex(pvs);
mScript.set_vertDots(pvs);
}
private void createProgramFragment() {
ProgramFragment.Builder backgroundBuilder = new ProgramFragment.Builder(mRS);
backgroundBuilder.setShader(mRes, R.raw.bg_fs);
ProgramFragment programFragmentBackground = backgroundBuilder.create();
mScript.set_fragBg(programFragmentBackground);
ProgramFragment.Builder builder = new ProgramFragment.Builder(mRS);
builder.setShader(mRes, R.raw.noisefield_fs);
builder.addTexture(Program.TextureType.TEXTURE_2D);
ProgramFragment pf = builder.create();
pf.bindSampler(Sampler.CLAMP_LINEAR(mRS), 0);
mScript.set_fragDots(pf);
}
private void createProgramRaster() {
ProgramRaster.Builder builder = new ProgramRaster.Builder(mRS);
builder.setPointSpriteEnabled(true);
ProgramRaster pr = builder.create();
mRS.bindProgramRaster(pr);
}
private void createProgramFragmentStore() {
ProgramStore.Builder builder = new ProgramStore.Builder(mRS);
builder.setBlendFunc(BlendSrcFunc.SRC_ALPHA, BlendDstFunc.ONE );
mRS.bindProgramStore(builder.create());
}
public void start() {
mRS.bindRootScript(mScript);
}
public void stop() {
mRS.bindRootScript(null);
}
public void resize(int w, int h) {
}
public void onTouchEvent(MotionEvent ev) {
int act = ev.getActionMasked();
if (act == MotionEvent.ACTION_UP || act == MotionEvent.ACTION_POINTER_UP) {
if(mTouchDown){
mTouchDown = false;
mScript.set_touchDown(mTouchDown);
}
return;
} else if( act == MotionEvent.ACTION_DOWN
|| act == MotionEvent.ACTION_MOVE
|| act == MotionEvent.ACTION_POINTER_DOWN) {
int pcount = ev.getPointerCount();
if(!mTouchDown){
mTouchDown = true;
mScript.set_touchDown(mTouchDown);
}
if(pcount > 0){
// just send first pointer position
mScript.invoke_touch(ev.getX(0), ev.getY(0));
}
}
}
}
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