Android example source code file (FountainRS.java)

This example Android source code file (FountainRS.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

allocation, android, content, control, element, fountainrs, part_count, partbuffer, partmesh, render, renderscriptgl, resources, script, simplemesh, somedata, type, util, utilities, utils

The FountainRS.java Android example source code

/*
 * Copyright (C) 2008 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 com.android.fountain;

import android.content.res.Resources;
import android.renderscript.*;
import android.util.Log;


public class FountainRS {
    public static final int PART_COUNT = 20000;

    static class SomeData {
        public int x;
        public int y;
        public int rate;
        public int count;
        public float r;
        public float g;
        public float b;
    }

    public FountainRS() {
    }

    public void init(RenderScriptGL rs, Resources res, int width, int height) {
        mRS = rs;
        mRes = res;
        initRS();
    }

    public void newTouchPosition(int x, int y, int rate) {
        if (mSD.rate == 0) {
            mSD.r = ((x & 0x1) != 0) ? 0.f : 1.f;
            mSD.g = ((x & 0x2) != 0) ? 0.f : 1.f;
            mSD.b = ((x & 0x4) != 0) ? 0.f : 1.f;
            if ((mSD.r + mSD.g + mSD.b) < 0.9f) {
                mSD.r = 0.8f;
                mSD.g = 0.5f;
                mSD.b = 1.f;
            }
        }
        mSD.rate = rate;
        mSD.x = x;
        mSD.y = y;
        mIntAlloc.data(mSD);
    }


    /////////////////////////////////////////

    private Resources mRes;

    private RenderScriptGL mRS;
    private Allocation mIntAlloc;
    private SimpleMesh mSM;
    private SomeData mSD;
    private Type mSDType;

    private void initRS() {
        mSD = new SomeData();
        mSDType = Type.createFromClass(mRS, SomeData.class, 1, "SomeData");
        mIntAlloc = Allocation.createTyped(mRS, mSDType);
        mSD.count = PART_COUNT;
        mIntAlloc.data(mSD);

        Element.Builder eb = new Element.Builder(mRS);
        eb.add(Element.createVector(mRS, Element.DataType.FLOAT_32, 2), "delta");
        eb.add(Element.createAttrib(mRS, Element.DataType.FLOAT_32, Element.DataKind.POSITION, 2), "position");
        eb.add(Element.createAttrib(mRS, Element.DataType.UNSIGNED_8, Element.DataKind.COLOR, 4), "color");
        Element primElement = eb.create();


        SimpleMesh.Builder smb = new SimpleMesh.Builder(mRS);
        int vtxSlot = smb.addVertexType(primElement, PART_COUNT);
        smb.setPrimitive(Primitive.POINT);
        mSM = smb.create();
        mSM.setName("PartMesh");

        Allocation partAlloc = mSM.createVertexAllocation(vtxSlot);
        partAlloc.setName("PartBuffer");
        mSM.bindVertexAllocation(partAlloc, 0);

        // All setup of named objects should be done by this point
        // because we are about to compile the script.
        ScriptC.Builder sb = new ScriptC.Builder(mRS);
        sb.setScript(mRes, R.raw.fountain);
        sb.setRoot(true);
        sb.setType(mSDType, "Control", 0);
        sb.setType(mSM.getVertexType(0), "point", 1);
        Script script = sb.create();
        script.setClearColor(0.0f, 0.0f, 0.0f, 1.0f);

        script.bindAllocation(mIntAlloc, 0);
        script.bindAllocation(partAlloc, 1);
        mRS.contextBindRootScript(script);
    }

}