質問編集履歴
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test
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File without changes
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test
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@@ -21,3 +21,321 @@
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```
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と入れればよいのでしょうか？
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```
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class Cube {
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//各バッファの接点
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private FloatBuffer mVertexBuffer;
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private FloatBuffer mNormalBuffer;
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private ShortBuffer mIndexBuffer;
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private FloatBuffer mTextureBuffer;
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// 接続する頂点の配列数
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private int numberOfindex = 36;
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//テクスチャの管理id
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private int textureId;
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//角度
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private float angle = 0f;
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public Cube(GL10 gl, Resources r) {
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float x = 2f;
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float y = 2f;
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float z = 0.1f;
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//頂点
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float[] vertices = {
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x, y, z, -x, y, z, -x,-y, z, x,-y, z, // v0-v1-v2-v3 front
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x, y, z, x,-y, z, x,-y,-z, x, y,-z, // v0-v3-v4-v5 right
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x, y, z, x, y,-z, -x, y,-z, -x, y, z, // v0-v5-v6-v1 top
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-x, y, z, -x, y,-z, -x,-y,-z, -x,-y, z, // v1-v6-v7-v2 left
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-x,-y,-z, x,-y,-z, x,-y, z, -x,-y, z, // v7-v4-v3-v2 bottom
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x,-y,-z, -x,-y,-z, -x, y,-z, x, y,-z // v4-v7-v6-v5 back
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};
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//テクスチャUV座標
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float[] textures = {
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1, 0, 0, 0, 0, 1, 1, 1, // v0-v1-v2-v3 front
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0, 0, 0, 1, 1, 1, 1, 0, // v0-v3-v4-v5 right
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0, 1, 1, 1, 0, 0, 1, 0, // v0-v5-v6-v1 top
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1, 0, 0, 0, 0, 1, 1, 1, // v1-v6-v7-v2 left
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0, 1, 1, 1, 1, 0, 0, 0, // v7-v4-v3-v2 bottom
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0, 1, 1, 1, 1, 0, 0, 0 // v4-v7-v6-v5 back
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};
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//法線ベクトル 表面と裏面どちらを向いているか
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float[] normals = {
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0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, // v0-v1-v2-v3 front
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1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, // v0-v3-v4-v5 right
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0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, // v0-v5-v6-v1 top
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-1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, // v1-v6-v7-v2 left
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0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1, 0, // v7-v4-v3-v2 bottom
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0, 0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1 // v4-v7-v6-v5 back
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};
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short indices[] = {
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0, 1, 2, 0, 2, 3, // front
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4, 5, 6, 4, 6, 7, // right
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8, 9,10, 8,10,11, // top
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12,13,14, 12,14,15, // left
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16,17,18, 16,18,19, // bottom
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20,21,22, 20,22,23 // back
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};
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// Vertex
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mVertexBuffer = makeFloatBuffer(vertices);
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//Normal
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mNormalBuffer = makeFloatBuffer(normals);
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// index
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mIndexBuffer = makeShortBuffer(indices);
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// texture
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mTextureBuffer = makeFloatBuffer(textures);
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textureId = loadTexture(gl, r, R.drawable.one);
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}
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//システム上のメモリ領域を確保するためのメソッド
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// Float用
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public static final FloatBuffer makeFloatBuffer(float[] arr) {
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ByteBuffer bb = ByteBuffer.allocateDirect(arr.length * 4);
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bb.order(ByteOrder.nativeOrder());
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FloatBuffer fb = bb.asFloatBuffer();
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fb.put(arr);
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fb.position(0);
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return fb;
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}
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//システム上のメモリ領域を確保するためのメソッド
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//Short用
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public static final ShortBuffer makeShortBuffer(short[] arr) {
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ByteBuffer bb = ByteBuffer.allocateDirect(arr.length * 4);
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bb.order(ByteOrder.nativeOrder());
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ShortBuffer fb = bb.asShortBuffer();
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fb.put(arr);
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fb.position(0);
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return fb;
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}
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//描画
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public void draw(GL10 gl) {
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//ここではz軸方向に -3.0だけ移動させます.
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gl.glTranslatef(0, 0, -30.0f);
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//マトリクスの回転
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gl.glRotatef(angle++, 0, 1, 0);
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//テクスチャ機能の有効化
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gl.glEnable(GL10.GL_TEXTURE_2D);
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//テクスチャオブジェクトの指定
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gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
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// 頂点のポインタを設定
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gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVertexBuffer);
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//法線ベクトルの指定
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gl.glNormalPointer(GL10.GL_FLOAT,0,mNormalBuffer);
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gl.glEnableClientState(GL10.GL_NORMAL_ARRAY);
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//テクスチャのポインタを設定
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gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTextureBuffer);
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// 頂点の描画
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// gl.glDrawElements( プリミティブ, 頂点の数, タイプ, インデックス)
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gl.glDrawElements(GL10.GL_TRIANGLES, numberOfindex, GL10.GL_UNSIGNED_SHORT, mIndexBuffer);
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}
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/**
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* テクスチャを読み込む.
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* 読み込む画像のサイズは2の階乗の値でなければならない.
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*/
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public static final int loadTexture(GL10 gl, Resources r, int resId) {
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int[] textures = new int[1];
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//読み込むBitmapのオプションの設定
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BitmapFactory.Options options = new BitmapFactory.Options();
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//リソースの自動リサイズをしない
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options.inScaled = false;
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// 32bit画像として読み込む
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options.inPreferredConfig = Config.ARGB_8888;
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//Bitmapの作成
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Bitmap bmp = BitmapFactory.decodeResource(r, resId, options);
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if (bmp == null) {
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return 0;
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}
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// OpenGL用のテクスチャを生成する
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gl.glGenTextures(1, textures, 0);
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gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
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GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bmp, 0);
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gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
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gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
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gl.glBindTexture(GL10.GL_TEXTURE_2D, 0);
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//OpenGLへの転送が完了したので、VMメモリ上に作成したBitmapを破棄する
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bmp.recycle();
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return textures[0];
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}
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}
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```
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