public void Cull()
{
vertex_count = 0;
for (int x = 0; x < MineGame.chunk_size; x++)
{
for (int y = 0; y < MineGame.chunk_size; y++)
{
for (int z = 0; z < MineGame.chunk_size; z++)
{
Block cur = blocks[x, y, z];
if (!cur.active)
{
continue;
}
cur.render_faces[Block.YPositive] = Convert.ToInt16(y == MineGame.chunk_size - 1 || !blocks[x, y + 1, z].active);
cur.render_faces[Block.XNegative] = Convert.ToInt16(x == 0 || !blocks[x - 1, y, z].active);
cur.render_faces[Block.XPositive] = Convert.ToInt16(x == MineGame.chunk_size - 1 || !blocks[x + 1, y, z].active);
cur.render_faces[Block.YNegative] = Convert.ToInt16((y == 0 || !blocks[x, y - 1, z].active) && chunk_y != 0);
cur.render_faces[Block.ZNegative] = Convert.ToInt16(z == 0 || !blocks[x, y, z - 1].active);
cur.render_faces[Block.ZPositive] = Convert.ToInt16(z == MineGame.chunk_size - 1 || !blocks[x, y, z + 1].active);
vertex_count += 6 * cur.renderedVerticeCount();
}
}
}
}
public void UpdateBuffer()
{
if (vertex_count != 0)
{
block_vertices = new VertexPositionColorTexture[vertex_count];
block_vertex_index = 0;
}
for (int x = 0; x < MineGame.chunk_size; x++)
{
for (int y = 0; y < MineGame.chunk_size; y++)
{
for (int z = 0; z < MineGame.chunk_size; z++)
{
Block cur = blocks[x, y, z];
if (cur.renderedVerticeCount() == 0)
{
continue;
}
Vector3 topLeftFront = cur.shapePosition + new Vector3(-0.5f, 0.5f, -0.5f);
Vector3 bottomLeftFront = cur.shapePosition + new Vector3(-0.5f, -0.5f, -0.5f);
Vector3 topRightFront = cur.shapePosition + new Vector3(0.5f, 0.5f, -0.5f);
Vector3 bottomRightFront = cur.shapePosition + new Vector3(0.5f, -0.5f, -0.5f);
Vector3 topLeftBack = cur.shapePosition + new Vector3(-0.5f, 0.5f, 0.5f);
Vector3 topRightBack = cur.shapePosition + new Vector3(0.5f, 0.5f, 0.5f);
Vector3 bottomLeftBack = cur.shapePosition + new Vector3(-0.5f, -0.5f, 0.5f);
Vector3 bottomRightBack = cur.shapePosition + new Vector3(0.5f, -0.5f, 0.5f);
for (int i = 0; i < 6; i++)
{
if (cur.render_faces[i] == 1) //render it
{
var color = Color.White;
if (cur.type == BlockType.Grass && i == Block.YPositive)
{
color = Color.FromNonPremultiplied(107, 168, 64, 255);
}
Vector2 textureTopLeft = game.texture_coordinates[cur.type][i, Block.textureTopLeft];
Vector2 textureBottomLeft = game.texture_coordinates[cur.type][i, Block.textureBottomLeft];
Vector2 textureTopRight = game.texture_coordinates[cur.type][i, Block.textureTopRight];
Vector2 textureBottomRight = game.texture_coordinates[cur.type][i, Block.textureBottomRight];
int offset = block_vertex_index;
switch (i)
{
case Block.ZNegative: //front
block_vertices[offset + 0] = new VertexPositionColorTexture(topLeftFront, color, textureTopLeft);
block_vertices[offset + 1] = new VertexPositionColorTexture(bottomLeftFront, color, textureBottomLeft);
block_vertices[offset + 2] = new VertexPositionColorTexture(topRightFront, color, textureTopRight);
block_vertices[offset + 3] = new VertexPositionColorTexture(bottomLeftFront, color, textureBottomLeft);
block_vertices[offset + 4] = new VertexPositionColorTexture(bottomRightFront, color, textureBottomRight);
block_vertices[offset + 5] = new VertexPositionColorTexture(topRightFront, color, textureTopRight);
break;
case Block.ZPositive: //back
block_vertices[offset + 0] = new VertexPositionColorTexture(topLeftBack, color, textureTopRight);
block_vertices[offset + 1] = new VertexPositionColorTexture(topRightBack, color, textureTopLeft);
block_vertices[offset + 2] = new VertexPositionColorTexture(bottomLeftBack, color, textureBottomRight);
block_vertices[offset + 3] = new VertexPositionColorTexture(bottomLeftBack, color, textureBottomRight);
block_vertices[offset + 4] = new VertexPositionColorTexture(topRightBack, color, textureTopLeft);
block_vertices[offset + 5] = new VertexPositionColorTexture(bottomRightBack, color, textureBottomLeft);
break;
case Block.YPositive: //top
block_vertices[offset + 0] = new VertexPositionColorTexture(topLeftFront, color, textureBottomLeft);
block_vertices[offset + 1] = new VertexPositionColorTexture(topRightBack, color, textureTopRight);
block_vertices[offset + 2] = new VertexPositionColorTexture(topLeftBack, color, textureTopLeft);
block_vertices[offset + 3] = new VertexPositionColorTexture(topLeftFront, color, textureBottomLeft);
block_vertices[offset + 4] = new VertexPositionColorTexture(topRightFront, color, textureBottomRight);
block_vertices[offset + 5] = new VertexPositionColorTexture(topRightBack, color, textureTopRight);
break;
case Block.YNegative: //Bottom
block_vertices[offset + 0] = new VertexPositionColorTexture(bottomLeftFront, color, textureTopLeft);
block_vertices[offset + 1] = new VertexPositionColorTexture(bottomLeftBack, color, textureBottomLeft);
block_vertices[offset + 2] = new VertexPositionColorTexture(bottomRightBack, color, textureBottomRight);
block_vertices[offset + 3] = new VertexPositionColorTexture(bottomLeftFront, color, textureTopLeft);
block_vertices[offset + 4] = new VertexPositionColorTexture(bottomRightBack, color, textureBottomRight);
block_vertices[offset + 5] = new VertexPositionColorTexture(bottomRightFront, color, textureTopRight);
break;
case Block.XPositive: //Right
block_vertices[offset + 0] = new VertexPositionColorTexture(topRightFront, color, textureTopLeft);
block_vertices[offset + 1] = new VertexPositionColorTexture(bottomRightFront, color, textureBottomLeft);
block_vertices[offset + 2] = new VertexPositionColorTexture(bottomRightBack, color, textureBottomRight);
block_vertices[offset + 3] = new VertexPositionColorTexture(topRightBack, color, textureTopRight);
block_vertices[offset + 4] = new VertexPositionColorTexture(topRightFront, color, textureTopLeft);
block_vertices[offset + 5] = new VertexPositionColorTexture(bottomRightBack, color, textureBottomRight);
break;
case Block.XNegative: //Left
block_vertices[offset + 0] = new VertexPositionColorTexture(topLeftFront, color, textureTopRight);
block_vertices[offset + 1] = new VertexPositionColorTexture(bottomLeftBack, color, textureBottomLeft);
block_vertices[offset + 2] = new VertexPositionColorTexture(bottomLeftFront, color, textureBottomRight);
block_vertices[offset + 3] = new VertexPositionColorTexture(topLeftBack, color, textureTopLeft);
block_vertices[offset + 4] = new VertexPositionColorTexture(bottomLeftBack, color, textureBottomLeft);
block_vertices[offset + 5] = new VertexPositionColorTexture(topLeftFront, color, textureTopRight);
break;
}
block_vertex_index += 6;
}
}
}
}
}
if (vertex_buffer != null)
{
block_vertices = null;
}
}