public void Render(Structure structure, int x, int y, int z, BlockAtlas blockAtlas, ChunkBuffer vbi)
{
var block = structure[x, y, z];
var blockData = blockAtlas[block.Id];
var tex = blockData.Textures[0];
var tc00 = new Uv(0, 0);
var tc10 = new Uv(1, 0);
var tc01 = new Uv(0, 1);
var tc11 = new Uv(1, 1);
if (tex != null)
{
var d = 0.0002f; // bleed compensation
tc00 = new Uv(tex.MinU + d, tex.MinV + d);
tc10 = new Uv(tex.MaxU - d, tex.MinV + d);
tc01 = new Uv(tex.MinU + d, tex.MaxV - d);
tc11 = new Uv(tex.MaxU - d, tex.MaxV - d);
}
var norm = (Vector3.UnitX + Vector3.UnitZ).Normalized();
vbi.Append(new Vertex(x, y, z + 1), new Vertex(norm.X, norm.Y, norm.Z), tc01);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(norm.X, norm.Y, norm.Z), tc11);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(norm.X, norm.Y, norm.Z), tc10);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(norm.X, norm.Y, norm.Z), tc00);
norm = (Vector3.UnitX - Vector3.UnitZ).Normalized();
vbi.Append(new Vertex(x, y, z), new Vertex(norm.X, norm.Y, norm.Z), tc01);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(norm.X, norm.Y, norm.Z), tc11);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(norm.X, norm.Y, norm.Z), tc10);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(norm.X, norm.Y, norm.Z), tc00);
}
/// <summary>
/// Initializes the VBO but does not modify graphics state
/// </summary>
public void Prerender()
{
const int color = 0xFFFFFF;
const int occludedColor = 0xC0C0C0;
_vbi.Reset();
for (var x = X * 16; x < X * 16 + 16; x++)
{
for (var z = Z * 16; z < Z * 16 + 16; z++)
{
var nx = x - X * 16 + 1;
var nz = z - Z * 16 + 1;
// Heightmap value here
var valueHere = (float)_heightmap[nx, nz];
// Neighboring positions
var valuePosX = _heightmap[nx + 1, nz];
var valueNegX = _heightmap[nx - 1, nz];
var valuePosZ = _heightmap[nx, nz + 1];
var valueNegZ = _heightmap[nx, nz - 1];
var valuePosXPosZ = _heightmap[nx + 1, nz + 1];
var valueNegXPosZ = _heightmap[nx - 1, nz + 1];
var valuePosXNegZ = _heightmap[nx + 1, nz - 1];
var valueNegXNegZ = _heightmap[nx - 1, nz - 1];
// Comparisons used in cheap AO
var isPosXHigher = valuePosX > valueHere;
var isNegXHigher = valueNegX > valueHere;
var isPosZHigher = valuePosZ > valueHere;
var isNegZHigher = valueNegZ > valueHere;
var isPosXPosZHigher = valuePosXPosZ > valueHere;
var isNegXPosZHigher = valueNegXPosZ > valueHere;
var isPosXNegZHigher = valuePosXNegZ > valueHere;
var isNegXNegZHigher = valueNegXNegZ > valueHere;
// Always draw a top face for a block
_vbi.Append(
new Vertex(x, valueHere, z),
SmallVertex.UnitY,
isPosXHigher || isPosZHigher || isPosXPosZHigher ? occludedColor : color
);
_vbi.Append(
new Vertex(x - 1, valueHere, z),
SmallVertex.UnitY,
isNegXHigher || isPosZHigher || isNegXPosZHigher ? occludedColor : color
);
_vbi.Append(
new Vertex(x - 1, valueHere, z - 1),
SmallVertex.UnitY,
isNegXHigher || isNegZHigher || isNegXNegZHigher ? occludedColor : color
);
_vbi.Append(
new Vertex(x, valueHere, z - 1),
SmallVertex.UnitY,
isPosXHigher || isNegZHigher || isPosXNegZHigher ? occludedColor : color
);
// Try and draw the PosZ face
if (valuePosZ < valueHere)
{
_vbi.Append(
new Vertex(x, valueHere, z),
SmallVertex.UnitZ,
color
);
_vbi.Append(
new Vertex(x, valuePosZ, z),
SmallVertex.UnitZ,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valuePosZ, z),
SmallVertex.UnitZ,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valueHere, z),
SmallVertex.UnitZ,
color
);
}
// Try and draw the NegZ face
if (valueNegZ < valueHere)
{
_vbi.Append(
new Vertex(x, valueHere, z - 1),
SmallVertex.UnitNZ,
color
);
_vbi.Append(
new Vertex(x, valueNegZ, z - 1),
SmallVertex.UnitNZ,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valueNegZ, z - 1),
SmallVertex.UnitNZ,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valueHere, z - 1),
SmallVertex.UnitNZ,
color
);
}
// Try and draw the PosX face
if (valuePosX < valueHere)
{
_vbi.Append(
new Vertex(x, valueHere, z),
SmallVertex.UnitX,
color
);
_vbi.Append(
new Vertex(x, valuePosX, z),
SmallVertex.UnitX,
occludedColor
);
_vbi.Append(
new Vertex(x, valuePosX, z - 1),
SmallVertex.UnitX,
occludedColor
);
_vbi.Append(
new Vertex(x, valueHere, z - 1),
SmallVertex.UnitX,
color
);
}
// Try and draw the NegX face
if (valueNegX < valueHere)
{
_vbi.Append(
new Vertex(x - 1, valueHere, z),
SmallVertex.UnitNX,
color
);
_vbi.Append(
new Vertex(x - 1, valueNegX, z),
SmallVertex.UnitNX,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valueNegX, z - 1),
SmallVertex.UnitNX,
occludedColor
);
_vbi.Append(
new Vertex(x - 1, valueHere, z - 1),
SmallVertex.UnitNX,
color
);
}
}
}
}
public void Render(Structure structure, int x, int y, int z, BlockAtlas blockAtlas, ChunkBuffer vbi)
{
var block = structure[x, y, z];
var blockData = blockAtlas[block.Id];
var tex = blockData.Textures[0];
Uv tc00, tc10, tc01, tc11;
TexCoord front, back, left, right;
front = back = left = right = blockData.Textures[1];
var top = blockData.Textures[0];
var bottom = blockData.Textures[2];
const float d = 0.0002f; // bleed compensation
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosX, blockAtlas))
{
CreateUv(right, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.PosX), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosX), tc10);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.PosX), tc11);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.PosX), tc01);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegX, blockAtlas))
{
CreateUv(left, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegX), tc01);
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.NegX), tc11);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.NegX), tc10);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.NegX), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosY, blockAtlas))
{
CreateUv(top, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.PosY), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosY), tc10);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.PosY), tc11);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.PosY), tc01);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegY, blockAtlas))
{
CreateUv(bottom, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegY), tc01);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.NegY), tc11);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.NegY), tc10);
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.NegY), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosZ, blockAtlas))
{
CreateUv(back, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.PosZ), tc01);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.PosZ), tc11);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosZ), tc10);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.PosZ), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegZ, blockAtlas))
{
CreateUv(front, d, out tc00, out tc10, out tc01, out tc11);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.NegZ), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.NegZ), tc10);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.NegZ), tc11);
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegZ), tc01);
}
}
public void Render(Structure structure, int x, int y, int z, BlockAtlas blockAtlas, ChunkBuffer vbi)
{
var block = structure[x, y, z];
var blockData = blockAtlas[block.Id];
var tex = blockData.Textures[0];
var tc00 = new Uv(0, 0);
var tc10 = new Uv(1, 0);
var tc01 = new Uv(0, 1);
var tc11 = new Uv(1, 1);
if (tex != null)
{
var d = 0.0002f; // bleed compensation
tc00 = new Uv(tex.MinU + d, tex.MinV + d);
tc10 = new Uv(tex.MaxU - d, tex.MinV + d);
tc01 = new Uv(tex.MinU + d, tex.MaxV - d);
tc11 = new Uv(tex.MaxU - d, tex.MaxV - d);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosX, blockAtlas))
{
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.PosX), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosX), tc10);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.PosX), tc11);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.PosX), tc01);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegX, blockAtlas))
{
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegX), tc01);
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.NegX), tc11);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.NegX), tc10);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.NegX), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosY, blockAtlas))
{
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.PosY), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosY), tc10);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.PosY), tc11);
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.PosY), tc01);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegY, blockAtlas))
{
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegY), tc01);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.NegY), tc11);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.NegY), tc10);
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.NegY), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.PosZ, blockAtlas))
{
vbi.Append(new Vertex(x, y, z + 1), new Vertex(FaceDir.PosZ), tc01);
vbi.Append(new Vertex(x + 1, y, z + 1), new Vertex(FaceDir.PosZ), tc11);
vbi.Append(new Vertex(x + 1, y + 1, z + 1), new Vertex(FaceDir.PosZ), tc10);
vbi.Append(new Vertex(x, y + 1, z + 1), new Vertex(FaceDir.PosZ), tc00);
}
if (structure.IsBorderingTransparent(x, y, z, FaceDir.NegZ, blockAtlas))
{
vbi.Append(new Vertex(x, y + 1, z), new Vertex(FaceDir.NegZ), tc00);
vbi.Append(new Vertex(x + 1, y + 1, z), new Vertex(FaceDir.NegZ), tc10);
vbi.Append(new Vertex(x + 1, y, z), new Vertex(FaceDir.NegZ), tc11);
vbi.Append(new Vertex(x, y, z), new Vertex(FaceDir.NegZ), tc01);
}
}