Java GL10.glDrawElements方法代码示例

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
@Override
public void onDrawFrame(GL10 gl) {
    gl.glClearColor(1.f, 0.f, 0.f, 1.f);
    gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

    gl.glLoadIdentity();
    gl.glTranslatef(0.f, 0.f, -50.f);

    long time = SystemClock.uptimeMillis() % 4000L;
    float angle = 0.090f * ((int) time);
    gl.glRotatef(angle, 0.f, 0.f, 1.f);

    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glColor4f(1.f, 1.f, 1.f, 1.f);
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glDrawElements(GL10.GL_TRIANGLES, indices.length, GL10.GL_UNSIGNED_SHORT, indexBuffer);

    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
}
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
/**
 * Encapsulates the OpenGL ES instructions for drawing this shape.
 *
 * @param gl - The OpenGL ES context in which to draw this shape.
 */
public void draw(GL10 gl) {
    // Since this shape uses vertex arrays, enable them
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);

    // draw the shape
    gl.glColor4f(       // set color
            color[0], color[1],
            color[2], color[3]);
    gl.glVertexPointer( // point to vertex data:
            COORDS_PER_VERTEX,
            GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glDrawElements(  // draw shape:
            GL10.GL_TRIANGLES,
            drawOrder.length, GL10.GL_UNSIGNED_SHORT,
            drawListBuffer);

    // Disable vertex array drawing to avoid
    // conflicts with shapes that don't use it
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
}
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
@Override
    public void draw(GL10 gl){
        gl.glRotatef(45f,0,0,0);
        gl.glFrontFace(GL10.GL_CCW);
        gl.glEnable(GL10.GL_CULL_FACE);
        gl.glCullFace(GL10.GL_BACK);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glVertexPointer(3, GL10.GL_FLOAT,0,mVertexBuffer);
        gl.glColorPointer(4,GL10.GL_FIXED,0,mColorBuffer);
//        gl.glDrawArrays(GL10.GL_TRIANGLES,0,3);
        gl.glDrawElements(GL10.GL_TRIANGLES,indices.length,GL10.GL_UNSIGNED_SHORT,mIndexBuffer);
//        gl.glDrawElements(GL10.GL_COLOR_ARRAY,colors.length,GL10.GL_FLOAT,mColorBuffer);

        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
        gl.glDisable(GL10.GL_CULL_FACE);
    }
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
@Override
    public void draw(GL10 gl) {
        gl.glClearColor(1.0f,1.0f,1.0f,1.0f);
        if(shouldLoadTexture){
            loadTexture(gl);
            shouldLoadTexture = false;
        }
        if(mTextureId != -1 && mVertexBuffer != null){
            gl.glEnable(GL10.GL_TEXTURE_2D);
            gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
            gl.glTexCoordPointer(2,GL10.GL_FLOAT,0,mVertexBuffer);
            gl.glBindTexture(GL10.GL_TEXTURE_2D,mTextureId);
        }
//        gl.glRotatef(180.0f,1,0,0);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glVertexPointer(2,GL10.GL_FLOAT,0,mVertexBuffer);
        gl.glDrawElements(GL10.GL_TRIANGLES, indices.length,
                GL10.GL_UNSIGNED_SHORT, mIndexBuffer);
//        gl.glDrawArrays(GL10.GL_TRIANGLES,0,4);
        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
        if(mTextureId != -1 && mVertexBuffer != null){
            gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
            gl.glDisable(GL10.GL_TEXTURE_2D);
        }

    }
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
@Override
    public void draw(GL10 gl){
        gl.glRotatef(30f, 1, 0, 0);
        gl.glRotatef(30f, 0, 1, 0);
//        gl.glRotatef(45f, 0, 0, 1);
        gl.glFrontFace(GL10.GL_CCW);
        gl.glEnable(GL10.GL_CULL_FACE);
        gl.glCullFace(GL10.GL_BACK);
        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glVertexPointer(3, GL10.GL_FLOAT,0,mVertexBuffer);
        gl.glColorPointer(4,GL10.GL_FIXED,0,mColorBuffer);
//        gl.glDrawArrays(GL10.GL_TRIANGLES,0,3);
        gl.glDrawElements(GL10.GL_TRIANGLES,indices.length,GL10.GL_UNSIGNED_SHORT,mIndexBuffer);
//        gl.glDrawElements(GL10.GL_COLOR_ARRAY,colors.length,GL10.GL_FLOAT,mColorBuffer);

        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
        gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
        gl.glDisable(GL10.GL_CULL_FACE);
    }
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
public void onDrawFrame(GL10 gl) {
    /*
     * Usually, the first thing one might want to do is to clear
     * the screen. The most efficient way of doing this is to use
     * glClear().
     */

    gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

    /*
     * Now we're ready to draw some 3D objects
     */

    gl.glMatrixMode(GL10.GL_MODELVIEW);
    gl.glLoadIdentity();
    gl.glTranslatef(0, 0, -2);

    /*
     * All the magic happens here. The rotation matrix mR reported by
     * SensorManager.getRotationMatrix() is a 4x4 row-major matrix.
     * We need to use its inverse for rendering. The inverse is
     * simply calculated by taking the matrix' transpose. However, since
     * glMultMatrixf() expects a column-major matrix, we can use mR
     * directly!
     */
    gl.glMultMatrixf(mR, 0);
    // some test code which will be used/cleaned up before we ship this.
    //gl.glMultMatrixf(mI, 0);

    gl.glVertexPointer(3, GL_FLOAT, 0, mVertexBuffer);
    gl.glColorPointer(4, GL_FLOAT, 0, mColorBuffer);
    gl.glDrawElements(GL_LINES, 6, GL_UNSIGNED_BYTE, mIndexBuffer);
}
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
/**
 * Draws this cube of the given GL-Surface
 * 
 * @param gl The GL-Surface this cube should be drawn upon.
 */
public void draw(GL10 gl) {
    gl.glEnable(GL10.GL_CULL_FACE);
    gl.glFrontFace(GL10.GL_CW);
    gl.glShadeModel(GL10.GL_SMOOTH);
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVertexBuffer);
    gl.glColorPointer(4, GL10.GL_FLOAT, 0, mColorBuffer);
    gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, mIndexBuffer);
}
 

import javax.microedition.khronos.opengles.GL10; //导入方法依赖的package包/类
/**
 * same as draw in a Sprite but doesn't render a texture
 * @param gl
 */
@Override
public void draw(GL10 gl) {
    textureCoordinates = Alignment.getVertices(this, Alignment.LEFT_TOP);
    ByteBuffer byteBuf = ByteBuffer.allocateDirect(textureCoordinates.length * 4);
    byteBuf.order(ByteOrder.nativeOrder());

    mTextureBuffer = byteBuf.asFloatBuffer();
    mTextureBuffer.put(textureCoordinates);
    mTextureBuffer.position(0);

    float vertices[] = Alignment.getVertices(this, Alignment.LEFT_TOP);

    ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
    vbb.order(ByteOrder.nativeOrder());

    vertexBuffer = vbb.asFloatBuffer();
    vertexBuffer.put(vertices);
    vertexBuffer.position(0);

    ByteBuffer ibb = ByteBuffer.allocateDirect(indices.length * 2);
    ibb.order(ByteOrder.nativeOrder());

    indexBuffer = ibb.asShortBuffer();
    indexBuffer.put(indices);
    indexBuffer.position(0);

    gl.glEnable(GL_BLEND);
    gl.glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    gl.glColor4f(red / 100, green / 100, blue / 100, alpha / 100);

    gl.glFrontFace(GL10.GL_CCW);
    gl.glEnable(GL10.GL_CULL_FACE);
    gl.glCullFace(GL10.GL_BACK);

    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);


    gl.glEnable(GL10.GL_TEXTURE_2D);
    gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);

    gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTextureBuffer);
    gl.glBindTexture(GL10.GL_TEXTURE_2D, 0);


    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glDrawElements(GL10.GL_TRIANGLE_STRIP, indices.length, GL10.GL_UNSIGNED_SHORT, indexBuffer);
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
    gl.glDisable(GL10.GL_CULL_FACE);
}