0

我目前正在研究 3D Arkanoid 克隆，并且正在使用图元绘制立方体。

我有 6 行，每行有 49 个块，所以总共 294 个块。通常我不会为优化而烦恼，但游戏在低端手机上的速度慢得离谱。我知道问题出在块的绘制上，因为游戏在删除代码后运行良好。

我设置原语的代码是

VertexPositionNormalTexture[] vertices1 = new VertexPositionNormalTexture[4];
VertexPositionNormalTexture[] vertices2 = new VertexPositionNormalTexture[4];
VertexPositionNormalTexture[] vertices3 = new VertexPositionNormalTexture[4];
VertexPositionNormalTexture[] vertices4 = new VertexPositionNormalTexture[4];
VertexPositionNormalTexture[] vertices5 = new VertexPositionNormalTexture[4];
VertexPositionNormalTexture[] vertices6 = new VertexPositionNormalTexture[4];

public void SetupVertices(){
 vertices1[0].Position = new Vector3(position.X, position.Y, position.Z);
        vertices1[0].TextureCoordinate = new Vector2(1, 1);
        vertices1[1].Position = new Vector3(position.X, position.Y + size.Y, position.Z);
        vertices1[1].TextureCoordinate = new Vector2(1, 0);
        vertices1[2].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z);
        vertices1[2].TextureCoordinate = new Vector2(0, 0);
        vertices1[3].Position = new Vector3(position.X + size.X, position.Y, position.Z);
        vertices1[3].TextureCoordinate = new Vector2(0, 1);
        //Another side

        vertices2[0].Position = new Vector3(position.X, position.Y, position.Z);
        vertices2[0].TextureCoordinate = new Vector2(0, 1);
        vertices2[1].Position = new Vector3(position.X, position.Y + size.Y, position.Z);
        vertices2[1].TextureCoordinate = new Vector2(0, 0);
        vertices2[2].Position = new Vector3(position.X, position.Y + size.Y, position.Z + size.Z);
        vertices2[2].TextureCoordinate = new Vector2(1, 0);
        vertices2[3].Position = new Vector3(position.X, position.Y, position.Z + size.Z);
        vertices2[3].TextureCoordinate = new Vector2(1, 1);
        //ANOTHER SIDE
        vertices3[0].Position = new Vector3(position.X + size.X, position.Y, position.Z + size.Z);
        vertices3[0].TextureCoordinate = new Vector2(0, 1);
        vertices3[1].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z + size.Z);
        vertices3[1].TextureCoordinate = new Vector2(0, 0);
        vertices3[2].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z);
        vertices3[2].TextureCoordinate = new Vector2(1, 0);
        vertices3[3].Position = new Vector3(position.X + size.X, position.Y, position.Z);
        vertices3[3].TextureCoordinate = new Vector2(1, 1);

        vertices4[0].Position = new Vector3(position.X, position.Y, position.Z + size.Z);
        vertices4[0].TextureCoordinate = new Vector2(0, 1);
        vertices4[1].Position = new Vector3(position.X, position.Y + size.Y, position.Z + size.Z);
        vertices4[1].TextureCoordinate = new Vector2(0, 0);
        vertices4[2].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z + size.Z);
        vertices4[2].TextureCoordinate = new Vector2(1, 0);
        vertices4[3].Position = new Vector3(position.X + size.X, position.Y, position.Z + size.Z);
        vertices4[3].TextureCoordinate = new Vector2(1, 1);


        vertices5[0].Position = new Vector3(position.X, position.Y + size.Y, position.Z);
        vertices5[0].TextureCoordinate = new Vector2(0, 0);
        vertices5[1].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z);
        vertices5[1].TextureCoordinate = new Vector2(1, 0);
        vertices5[2].Position = new Vector3(position.X + size.X, position.Y + size.Y, position.Z + size.Z);
        vertices5[2].TextureCoordinate = new Vector2(1, 1);
        vertices5[3].Position = new Vector3(position.X, position.Y + size.Y, position.Z + size.Z);
        vertices5[3].TextureCoordinate = new Vector2(0, 1);

        //bottom
        vertices6[0].Position = new Vector3(position.X, position.Y, position.Z);
        vertices6[0].TextureCoordinate = new Vector2(0, 0);
        vertices6[1].Position = new Vector3(position.X + size.X, position.Y, position.Z);
        vertices6[1].TextureCoordinate = new Vector2(1, 0);
        vertices6[2].Position = new Vector3(position.X + size.X, position.Y, position.Z + size.Z);
        vertices6[2].TextureCoordinate = new Vector2(1, 1);
        vertices6[3].Position = new Vector3(position.X, position.Y, position.Z + size.Z);
        vertices6[3].TextureCoordinate = new Vector2(0, 1);
        numTriangles = 4;
        indices = new short[numTriangles + 2];

        int i = 0;
        indices[i++] = 0;
        indices[i++] = 1;
        indices[i++] = 3;
        indices[i++] = 2;
}

我绘制块的代码是基本的，但我不知道如何优化它。

//Game1.CS Code
GraphicsDevice.SamplerStates[0] = SamplerState.LinearClamp; // need to do this on reach     devices to allow non 2^n textures


        #region GamePlaying
        if (gameState == State.BREAKOUT || gameState == State.GAMEOVERBREAKOUT)
        {
            foreach (Block block in lastBlocks)
            {
                block.Draw(camera);
            }
            foreach (Block block in fourthBlocks)
            {
                block.Draw(camera);
            }
            foreach (Block block in thirdBlocks)
            {
                block.Draw(camera);
            }
            foreach (Block block in secondBlocks)
            {
                block.Draw(camera);
            }
            foreach (Block block in firstBlocks)
            {
                block.Draw(camera);
            }
            foreach (Block block in fifthBlocks)
            {
                block.Draw(camera);
            }
}

Block.CS 绘制代码

public void Draw(Camera camera)
    {
        effect.View = camera.View;
        effect.Projection = camera.Projection;
        effect.World = rotationMatrix;


        foreach (EffectPass pass in effect.CurrentTechnique.Passes)
        {
            pass.Apply();
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices1, 0, 4, indices, 0, numTriangles);
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices2, 0, 4, indices, 0, numTriangles);
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices3, 0, 4, indices, 0, numTriangles);
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices4, 0, 4, indices, 0, numTriangles);
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices5, 0, 4, indices, 0, numTriangles);
            graphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleStrip, vertices6, 0, 4, indices, 0, numTriangles);
        }

    }
4

1 回答 1

1

每个块调用 DrawUserIndexedPrimitives 是问题所在。这种绘制调用背后的想法是让您用很少的调用绘制大量的图元，而不是进行多次绘制的调用。

你有两个选择：

  1. 使用SpriteBatch绘制四边形（这会在内部为您执行批处理，因此您不必处理它）。
  2. 与其在每个 Draw 调用中直接调用 DrawUserIndexedPrimitives，不如在一个临时缓冲区中累积顶点（和重新编号的索引），并在所有对象都累积后提交一次（针对一组索引的每个效果）。

希望这可以帮助。

于 2013-08-27T20:48:28.340 回答