0
我正在製作（另一個）MineCraft克隆，我遇到了一個有趣的問題。我有一個公共枚舉，它列出了一個特定立方體可以存在的所有立方體類型，並且我有一個包含立方體的3d數組。每個立方體都有一個特定的類型，我遍歷這個數組以獲得每個立方體的頂點，然後將這些頂點傳遞給爲特定立方體類型指定的頂點緩衝區。當我創建一個隨機數組的多維數據集或單個多維數據集，並告訴它它應該是什麼樣的紋理都按預期繪製。我現在試圖弄清楚如何繪製草立方體的隨機「表面」，並用灰塵立方體填充y軸以下的所有東西。最奇怪的事情發生了，最頂級的立方體是泥土，它用草立方體填充所有底部的立方體！當我禁用循環以填充地下污垢時，最頂端的立方體正按預期顯示草。XNA正在拖動錯誤的紋理？
這是我認爲是代碼的相關部分。這裏是立方體類型設置：
// Create a random surface level
Perlin perlin = new Perlin();
for (int x = 0; x < Game.ChunkWidth_X; x++)
{
for (int z = 0; z < Game.ChunkDepth_Z; z++)
{
double XVal = Convert.ToDouble(x) * 1.1;
double ZVal = Convert.ToDouble(z) * 1.1;
double YVal = Game.ChunkHeight_Y/2 * 1.1;
double PerlinValue = perlin.GetValue(XVal, YVal, ZVal);
int YVal_new = Convert.ToInt32(YVal + (PerlinValue * 10));
if (YVal_new > Game.ChunkHeight_Y - 1) { YVal_new = Game.ChunkHeight_Y - 1; }
if (YVal_new < 0) { YVal_new = 0; }
// Set the grass cube
Cube NewCube = new Cube(new Vector3(0.5f, 0.5f, 0.5f), new Vector3(x, YVal_new, z));
NewCube.cubeType = CubeType.Grass;
CubeGrid[x, YVal_new, z] = NewCube;
// Fill below it with dirt
for (int y = YVal_new - 1; y >= 0; y--)
{
Cube NewCube2 = new Cube(new Vector3(0.5f, 0.5f, 0.5f), new Vector3(x, y, z));
NewCube2.cubeType = CubeType.Dirt;
CubeGrid[x, y, z] = NewCube2;
}
// Fill above it with air
for (int y = YVal_new + 1; y < Game.ChunkHeight_Y; y++)
{
Cube NewCube2 = new Cube(new Vector3(0.5f, 0.5f, 0.5f), new Vector3(x, y, z));
NewCube2.cubeType = CubeType.Air;
CubeGrid[x, y, z] = NewCube2;
}
}
}
這是我拉來放入適當的緩衝頂點：
Dictionary<CubeType, List<VertexPositionNormalTexture>> DrawableVertices = new Dictionary<CubeType, List<VertexPositionNormalTexture>>();
// Get the proper vertices for each cube type and put in the appropriate dictionary
for (int x = 0; x < Game.ChunkWidth_X; x++)
{
for (int z = 0; z < Game.ChunkDepth_Z; z++)
{
for (int y = 0; y < Game.ChunkHeight_Y; y++)
{
CubeGrid[x,y,z].CreateVertices();
string test = CubeGrid[x, y, z].cubeType.ToString();
foreach (VertexPositionNormalTexture TargetVertex in CubeGrid[x, y, z].DisplayableVertices)
{
if (!DrawableVertices.ContainsKey(CubeGrid[x, y, z].cubeType))
{
List<VertexPositionNormalTexture> NewList = new List<VertexPositionNormalTexture>();
NewList.Add(TargetVertex);
DrawableVertices.Add(CubeGrid[x, y, z].cubeType, NewList);
}
else
{
DrawableVertices[CubeGrid[x, y, z].cubeType].Add(TargetVertex);
}
}
}
}
}
這裏是它的第二部分：
foreach (KeyValuePair<CubeType, List<VertexPositionNormalTexture>> KVP in DrawableVertices)
{
VertexBuffer cubeBuffer = new VertexBuffer(device, typeof(VertexPositionNormalTexture), KVP.Value.Count, BufferUsage.WriteOnly);
cubeBuffer.SetData(KVP.Value.ToArray());
// Update our collection of vertex buffers
CubeType_VertexBuffers[KVP.Key] = cubeBuffer;
// Get the triangle count for the buffer
CubeType_TriangleCount[KVP.Key] = KVP.Value.Count/3;
}
最後，這裏是我的畫：
// Go through each vertex buffer we have created, and draw it.
foreach (KeyValuePair<CubeType, VertexBuffer> KVP in CubeType_VertexBuffers)
{
foreach (EffectPass pass in testEffect.CurrentTechnique.Passes)
{
if (CubeType_TriangleCount[KVP.Key] > 0) // if this buffer has triangles, draw it.
{
pass.Apply();
testEffect.View = camera.ViewMatrix;
testEffect.TextureEnabled = true;
testEffect.Projection = camera.ProjectionMatrix;
testEffect.World = worldMatrix;
testEffect.Texture = CubeType_Texture[KVP.Key];
device.SetVertexBuffer(KVP.Value);
device.DrawPrimitives(PrimitiveType.TriangleList, 0, CubeType_TriangleCount[KVP.Key]);
}
}
}
base.Draw(gameTime);
最奇怪的是，當我手動設置多維數據集類型時，所有內容都按照預期繪製出適當的紋理。我應該嘗試解決哪些其他問題？我試圖對每個立方體類型做出特定的效果都無濟於事。