我有一个工作的形状,但当我尝试更改坐标时它会消失。 这就是我所做的。
这是类级变量:
private BasicEffect _effect;
private VertexPositionColor[] _vertices = new VertexPositionColor[5];
然后在初始化方法中我把这些:
float aspectRatio = (float)GraphicsDevice.Viewport.Bounds.Width / GraphicsDevice.Viewport.Bounds.Height;
Matrix projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(45), aspectRatio, 0.1f, 1000.0f);
Matrix view = Matrix.CreateLookAt(new Vector3(0, 0, 10), Vector3.Zero, Vector3.Up);
_effect = new BasicEffect(GraphicsDevice);
_effect.LightingEnabled = false;
_effect.TextureEnabled = false;
_effect.VertexColorEnabled = true;
_effect.Projection = projection;
_effect.View = view;
_effect.World = Matrix.Identity;
Color color = Color.Black;
_vertices[0] = new VertexPositionColor(new Vector3(-1, -1, 0), color);
_vertices[2] = new VertexPositionColor(new Vector3(-1, 1, 0), color);
_vertices[2] = new VertexPositionColor(new Vector3(1, -1, 0), color);
_vertices[3] = new VertexPositionColor(new Vector3(1, 1, 0), color);
在绘制方法中我把:
foreach (EffectPass pass in _effect.CurrentTechnique.Passes)
{
// Apply the pass
pass.Apply();
// Draw the square
GraphicsDevice.DrawUserPrimitives(PrimitiveType.TriangleStrip, _vertices, 0, 2);
}
这很好用。但当我把它改成这个时,它就不再起作用了。
_vertices[1].Position = new Vector3(-0.10f, 1.37f, -3.0f);
_vertices[0].Position = new Vector3(-0.15f, 1.40f, -3.0f);
_vertices[2].Position = new Vector3(-0.00f, 1.40f, -3.0f);
_vertices[4].Position = new Vector3(0.15f, 1.40f, -3.0f);
_vertices[3].Position = new Vector3(0.10f, 1.37f, -3.0f);
我做了另一个改变:
GraphicsDevice.DrawUserPrimitives<VertexPositionColor>(PrimitiveType.TriangleStrip, _vertices, 0, 3);
任何想法?
提前致谢
答案 0 :(得分:1)