Android example source code file (SimpleMesh.java)

This example Android source code file (SimpleMesh.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, builder, color, element, entry, ids, illegalstateexception, max, normal, primitive, renderscript, simplemesh, texture_0, type, util, utilities, utils

The SimpleMesh.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 android.renderscript;

import android.util.Config;
import android.util.Log;

/**
 * @hide
 *
 **/
public class SimpleMesh extends BaseObj {
    Type[] mVertexTypes;
    Type mIndexType;
    //Type mBatcheType;
    Primitive mPrimitive;

    SimpleMesh(int id, RenderScript rs) {
        super(rs);
        mID = id;
    }

    public void bindVertexAllocation(Allocation a, int slot) {
        mRS.validate();
        mRS.nSimpleMeshBindVertex(mID, a.mID, slot);
    }

    public void bindIndexAllocation(Allocation a) {
        mRS.validate();
        mRS.nSimpleMeshBindIndex(mID, a.mID);
    }

    public Allocation createVertexAllocation(int slot) {
        mRS.validate();
        return Allocation.createTyped(mRS, mVertexTypes[slot]);
    }

    public Allocation createIndexAllocation() {
        mRS.validate();
        return Allocation.createTyped(mRS, mIndexType);
    }

    public Type getVertexType(int slot) {
        return mVertexTypes[slot];
    }

    public Type getIndexType() {
        return mIndexType;
    }

    public static class Builder {
        RenderScript mRS;

        class Entry {
            Type t;
            Element e;
            int size;
        }

        int mVertexTypeCount;
        Entry[] mVertexTypes;
        Entry mIndexType;
        //Entry mBatchType;
        Primitive mPrimitive;


        public Builder(RenderScript rs) {
            mRS = rs;
            mVertexTypeCount = 0;
            mVertexTypes = new Entry[16];
            mIndexType = new Entry();
        }

        public int addVertexType(Type t) throws IllegalStateException {
            if (mVertexTypeCount >= mVertexTypes.length) {
                throw new IllegalStateException("Max vertex types exceeded.");
            }

            int addedIndex = mVertexTypeCount;
            mVertexTypes[mVertexTypeCount] = new Entry();
            mVertexTypes[mVertexTypeCount].t = t;
            mVertexTypeCount++;
            return addedIndex;
        }

        public int addVertexType(Element e, int size) throws IllegalStateException {
            if (mVertexTypeCount >= mVertexTypes.length) {
                throw new IllegalStateException("Max vertex types exceeded.");
            }

            int addedIndex = mVertexTypeCount;
            mVertexTypes[mVertexTypeCount] = new Entry();
            mVertexTypes[mVertexTypeCount].e = e;
            mVertexTypes[mVertexTypeCount].size = size;
            mVertexTypeCount++;
            return addedIndex;
        }

        public void setIndexType(Type t) {
            mIndexType.t = t;
            mIndexType.e = null;
            mIndexType.size = 0;
        }

        public void setIndexType(Element e, int size) {
            mIndexType.t = null;
            mIndexType.e = e;
            mIndexType.size = size;
        }

        public void setPrimitive(Primitive p) {
            mPrimitive = p;
        }


        Type newType(Element e, int size) {
            Type.Builder tb = new Type.Builder(mRS, e);
            tb.add(Dimension.X, size);
            return tb.create();
        }

        static synchronized SimpleMesh internalCreate(RenderScript rs, Builder b) {
            Type[] toDestroy = new Type[18];
            int toDestroyCount = 0;

            int indexID = 0;
            if (b.mIndexType.t != null) {
                indexID = b.mIndexType.t.mID;
            } else if (b.mIndexType.size != 0) {
                b.mIndexType.t = b.newType(b.mIndexType.e, b.mIndexType.size);
                indexID = b.mIndexType.t.mID;
                toDestroy[toDestroyCount++] = b.mIndexType.t;
            }

            int[] IDs = new int[b.mVertexTypeCount];
            for(int ct=0; ct < b.mVertexTypeCount; ct++) {
                if (b.mVertexTypes[ct].t != null) {
                    IDs[ct] = b.mVertexTypes[ct].t.mID;
                } else {
                    b.mVertexTypes[ct].t = b.newType(b.mVertexTypes[ct].e, b.mVertexTypes[ct].size);
                    IDs[ct] = b.mVertexTypes[ct].t.mID;
                    toDestroy[toDestroyCount++] = b.mVertexTypes[ct].t;
                }
            }

            int id = rs.nSimpleMeshCreate(0, indexID, IDs, b.mPrimitive.mID);
            for(int ct=0; ct < toDestroyCount; ct++) {
                toDestroy[ct].destroy();
            }

            return new SimpleMesh(id, rs);
        }

        public SimpleMesh create() {
            mRS.validate();
            SimpleMesh sm = internalCreate(mRS, this);
            sm.mVertexTypes = new Type[mVertexTypeCount];
            for(int ct=0; ct < mVertexTypeCount; ct++) {
                sm.mVertexTypes[ct] = mVertexTypes[ct].t;
            }
            sm.mIndexType = mIndexType.t;
            sm.mPrimitive = mPrimitive;
            return sm;
        }
    }

    public static class TriangleMeshBuilder {
        float mVtxData[];
        int mVtxCount;
        short mIndexData[];
        int mIndexCount;
        RenderScript mRS;
        Element mElement;

        float mNX = 0;
        float mNY = 0;
        float mNZ = -1;
        float mS0 = 0;
        float mT0 = 0;
        float mR = 1;
        float mG = 1;
        float mB = 1;
        float mA = 1;

        int mVtxSize;
        int mFlags;

        public static final int COLOR = 0x0001;
        public static final int NORMAL = 0x0002;
        public static final int TEXTURE_0 = 0x0100;

        public TriangleMeshBuilder(RenderScript rs, int vtxSize, int flags) {
            mRS = rs;
            mVtxCount = 0;
            mIndexCount = 0;
            mVtxData = new float[128];
            mIndexData = new short[128];
            mVtxSize = vtxSize;
            mFlags = flags;

            if (vtxSize < 2 || vtxSize > 3) {
                throw new IllegalArgumentException("Vertex size out of range.");
            }
        }

        private void makeSpace(int count) {
            if ((mVtxCount + count) >= mVtxData.length) {
                float t[] = new float[mVtxData.length * 2];
                System.arraycopy(mVtxData, 0, t, 0, mVtxData.length);
                mVtxData = t;
            }
        }

        private void latch() {
            if ((mFlags & COLOR) != 0) {
                makeSpace(4);
                mVtxData[mVtxCount++] = mR;
                mVtxData[mVtxCount++] = mG;
                mVtxData[mVtxCount++] = mB;
                mVtxData[mVtxCount++] = mA;
            }
            if ((mFlags & TEXTURE_0) != 0) {
                makeSpace(2);
                mVtxData[mVtxCount++] = mS0;
                mVtxData[mVtxCount++] = mT0;
            }
            if ((mFlags & NORMAL) != 0) {
                makeSpace(3);
                mVtxData[mVtxCount++] = mNX;
                mVtxData[mVtxCount++] = mNY;
                mVtxData[mVtxCount++] = mNZ;
            }
        }

        public void addVertex(float x, float y) {
            if (mVtxSize != 2) {
                throw new IllegalStateException("add mistmatch with declared components.");
            }
            makeSpace(2);
            mVtxData[mVtxCount++] = x;
            mVtxData[mVtxCount++] = y;
            latch();
        }

        public void addVertex(float x, float y, float z) {
            if (mVtxSize != 3) {
                throw new IllegalStateException("add mistmatch with declared components.");
            }
            makeSpace(3);
            mVtxData[mVtxCount++] = x;
            mVtxData[mVtxCount++] = y;
            mVtxData[mVtxCount++] = z;
            latch();
        }

        public void setTexture(float s, float t) {
            if ((mFlags & TEXTURE_0) == 0) {
                throw new IllegalStateException("add mistmatch with declared components.");
            }
            mS0 = s;
            mT0 = t;
        }

        public void setNormal(float x, float y, float z) {
            if ((mFlags & NORMAL) == 0) {
                throw new IllegalStateException("add mistmatch with declared components.");
            }
            mNX = x;
            mNY = y;
            mNZ = z;
        }

        public void setColor(float r, float g, float b, float a) {
            if ((mFlags & COLOR) == 0) {
                throw new IllegalStateException("add mistmatch with declared components.");
            }
            mR = r;
            mG = g;
            mB = b;
            mA = a;
        }

        public void addTriangle(int idx1, int idx2, int idx3) {
            if((idx1 >= mVtxCount) || (idx1 < 0) ||
               (idx2 >= mVtxCount) || (idx2 < 0) ||
               (idx3 >= mVtxCount) || (idx3 < 0)) {
               throw new IllegalStateException("Index provided greater than vertex count.");
            }
            if ((mIndexCount + 3) >= mIndexData.length) {
                short t[] = new short[mIndexData.length * 2];
                System.arraycopy(mIndexData, 0, t, 0, mIndexData.length);
                mIndexData = t;
            }
            mIndexData[mIndexCount++] = (short)idx1;
            mIndexData[mIndexCount++] = (short)idx2;
            mIndexData[mIndexCount++] = (short)idx3;
        }

        public SimpleMesh create() {
            Element.Builder b = new Element.Builder(mRS);
            int floatCount = mVtxSize;
            b.add(Element.createAttrib(mRS,
                                       Element.DataType.FLOAT_32,
                                       Element.DataKind.POSITION,
                                       mVtxSize), "position");
            if ((mFlags & COLOR) != 0) {
                floatCount += 4;
                b.add(Element.createAttrib(mRS,
                                           Element.DataType.FLOAT_32,
                                           Element.DataKind.COLOR,
                                           4), "color");
            }
            if ((mFlags & TEXTURE_0) != 0) {
                floatCount += 2;
                b.add(Element.createAttrib(mRS,
                                           Element.DataType.FLOAT_32,
                                           Element.DataKind.TEXTURE,
                                           2), "texture");
            }
            if ((mFlags & NORMAL) != 0) {
                floatCount += 3;
                b.add(Element.createAttrib(mRS,
                                           Element.DataType.FLOAT_32,
                                           Element.DataKind.NORMAL,
                                           3), "normal");
            }
            mElement = b.create();

            Builder smb = new Builder(mRS);
            smb.addVertexType(mElement, mVtxCount / floatCount);
            smb.setIndexType(Element.createIndex(mRS), mIndexCount);
            smb.setPrimitive(Primitive.TRIANGLE);
            SimpleMesh sm = smb.create();

            Allocation vertexAlloc = sm.createVertexAllocation(0);
            Allocation indexAlloc = sm.createIndexAllocation();
            sm.bindVertexAllocation(vertexAlloc, 0);
            sm.bindIndexAllocation(indexAlloc);

            vertexAlloc.data(mVtxData);
            vertexAlloc.uploadToBufferObject();

            indexAlloc.data(mIndexData);
            indexAlloc.uploadToBufferObject();

            return sm;
        }
    }
}