public void GenerateNormals()
{
Vector3[] norms = new Vector3[vb.Count];
int[] count = new int[vb.Count];
foreach (var p in parts)
{
for (int i = 0; i < p.IndexBuffer.Count; i += 3)
{
int i1 = (int)p.IndexBuffer[i];
int i2 = (int)p.IndexBuffer[i + 1];
int i3 = (int)p.IndexBuffer[i + 2];
var v1 = vb[i1].Position;
var v2 = vb[i2].Position;
var v3 = vb[i3].Position;
var c1 = v2 - v1;
var c2 = v3 - v1;
var cross = Vector3.Cross(c1, c2).Normalize();
norms[i1] += cross;
norms[i2] += cross;
norms[i3] += cross;
++count[i1];
++count[i2];
++count[i3];
}
}
for (int i = 0; i < norms.Length; i++)
{
VertexPositionTexCoordNormal n = vb[i];
n.Normal = norms[i] / count[i];
vb[i] = n;
}
}
public virtual void InitializeGraphics()
{
if (heightmap == null && string.IsNullOrEmpty(Heightmap))
return;
if (heightmap == null)
owner.Resources.Load(Heightmap, out heightmap);
//if (heightmap.Width != heightmap.Height)
//throw new NotSupportedException("Must be rectangular heightmap");
int num_vertices = (heightmap.Width) * (heightmap.Height);
if (vb != null)
DoDispose();
vb = new VertexBuffer<VertexPositionTexCoordNormal>(VertexPositionTexCoordNormal.Descriptor);
vb.Allocate(num_vertices);
if (mat_name != null)
owner.Resources.Load(mat_name, out mat);
size = CellSize * heightmap.Width;
float s2 = size / 2;
int vi = 0;
float xx = 0;
float yy = -s2;
Vector3[,] norms = new Vector3[heightmap.Height, heightmap.Width];
for (int i = 0; i < heightmap.Height; i++)
{
for (int j = 0; j < heightmap.Width; j++)
{
Vector3 n = new Vector3();
n.x = (heightmap[i - 1, j] - heightmap[i + 1, j]) * Height;
n.y = (heightmap[i, j - 1] - heightmap[i, j + 1]) * Height;
n.z = 2.0f / (heightmap.Width + 1) / CellSize + 2.0f / (heightmap.Height + 1) / CellSize;
norms[i, j] = n.Normalize();
}
}
for (int i = 0; i < heightmap.Height; i++)
{
xx = -s2;
for (int j = 0; j < heightmap.Width; j++, vi++)
{
vb[vi] = new VertexPositionTexCoordNormal()
{
Position = new Vector3(xx, heightmap[i, j] * Height, yy),
Normal = norms[i, j]
};
xx += CellSize;
}
yy += CellSize;
}
float offset = s2 / 2;
int x_count = heightmap.Width / 2;
int y_count = heightmap.Height / 2;
var new_size = new Vector3(s2, size / 8, s2);
blocks = new TerrainBlock[4];
blocks[0] = new TerrainBlock(0, 0, x_count, y_count, new BoundingBox()
{
Size = new_size,
Position = new Vector3(-offset, 0, offset)
}, 0, this);
blocks[1] = new TerrainBlock(x_count-1, 0, x_count, y_count, new BoundingBox()
{
Size = new_size,
Position = new Vector3(offset, 0, offset)
}, 0, this);
blocks[2] = new TerrainBlock(x_count-1, y_count-1, x_count, y_count, new BoundingBox()
{
Size = new_size,
Position = new Vector3(offset, 0, -offset)
}, 0, this);
blocks[3] = new TerrainBlock(0, y_count-1, x_count, y_count, new BoundingBox()
{
Size = new_size,
Position = new Vector3(-offset, 0, -offset)
}, 0, this);
vb.BufferData(VboUsage.GL_STATIC_DRAW);
vb.FreeClientData();
init_finished = true;
}
public override Model Build()
{
Model ret = new Model();
VertexBuffer<VertexPositionTexCoordNormal> vb = new VertexBuffer<VertexPositionTexCoordNormal>(VertexPositionTexCoordNormal.Descriptor);
//IndexBuffer<uint> ib = new IndexBuffer<uint>();
float ang_inc = (float)(2 * Math.PI) / sides;
int vsides = sides / 2 - 2;
float ang = 0;
vb.Allocate(sides * (sides / 2 - 2) + 2);
int index = 0;
for (int i = 0; i < sides; i++, ang += ang_inc)
{
float cs = (float)Math.Cos(ang);
float ss = (float)Math.Sin(ang);
float sang_inc = (float)Math.PI / vsides;
float sang = -((float)Math.PI / 2) + sang_inc;
for (int j = 0; j < vsides; j++, sang += sang_inc, ++index)
{
float vcs = (float)Math.Cos(sang);
float vss = (float)Math.Sin(sang);
Vector3 pos = new Vector3(
cs * radius * vcs,
vss * radius,
ss * radius * vss);
vb[index] = new VertexPositionTexCoordNormal()
{
Position = pos,
TexCoord = new Vector2(),
Normal = new Vector3(cs * vcs, vss, ss * vss)
};
}
vb[index] = new VertexPositionTexCoordNormal()
{
Position = new Vector3(0, -radius, 0),
Normal = new Vector3(0, -1, 0)
};
vb[index + 1] = new VertexPositionTexCoordNormal()
{
Position = new Vector3(0, radius, 0),
Normal = new Vector3(0, radius, 0)
};
}
ret.VertexBuffer = vb;
vb.BufferData(Glorg2.Graphics.OpenGL.VboUsage.GL_STATIC_DRAW);
return ret;
}
public override Model Build()
{
Model ret = new Model();
var w2 = width / 2;
var h2 = height / 2;
var d2 = depth / 2;
ret.VertexBuffer = new VertexBuffer<VertexPositionTexCoordNormal>(VertexPositionTexCoordNormal.Descriptor);
ret.VertexBuffer.Allocate(24);
var vb = ret.VertexBuffer;
var ib = new IndexBuffer<uint>();
//ib.Allocate(36);
Vector3[] pos = new Vector3[8];
pos[0] = new Vector3(-w2, h2, d2);
pos[1] = new Vector3(w2, h2, d2);
pos[2] = new Vector3(w2, h2, -d2);
pos[3] = new Vector3(-w2, h2, -d2);
pos[4] = new Vector3(-w2, -h2, d2);
pos[5] = new Vector3(w2, -h2, d2);
pos[6] = new Vector3(w2, -h2, -d2);
pos[7] = new Vector3(-w2, -h2, -d2);
ret.Parts.Add(
new ModelPart()
{
IndexBuffer = ib
}
);
vb[0] = new VertexPositionTexCoordNormal()
{
Position = pos[0],
Normal = Vector3.Up,
TexCoord = new Vector2(0, 0)
};
vb[1] = new VertexPositionTexCoordNormal()
{
Position = pos[1],
Normal = Vector3.Up,
TexCoord = new Vector2(1, 0)
};
vb[2] = new VertexPositionTexCoordNormal()
{
Position = pos[2],
Normal = Vector3.Up,
TexCoord = new Vector2(1, 1)
};
vb[3] = new VertexPositionTexCoordNormal()
{
Position = pos[3],
Normal = Vector3.Up,
TexCoord = new Vector2(0, 1)
};
vb[4] = new VertexPositionTexCoordNormal()
{
Position = pos[7],
Normal = Vector3.Down,
TexCoord = new Vector2(0, 0)
};
vb[5] = new VertexPositionTexCoordNormal()
{
Position = pos[6],
Normal = Vector3.Down,
TexCoord = new Vector2(1, 0)
};
vb[6] = new VertexPositionTexCoordNormal()
{
Position = pos[5],
Normal = Vector3.Down,
TexCoord = new Vector2(1, 1)
};
vb[7] = new VertexPositionTexCoordNormal()
{
Position = pos[4],
Normal = Vector3.Down,
TexCoord = new Vector2(0, 1)
};
vb[8] = new VertexPositionTexCoordNormal()
{
Position = pos[4],
Normal = Vector3.North,
TexCoord = new Vector2(0, 0)
};
vb[9] = new VertexPositionTexCoordNormal()
{
Position = pos[5],
Normal = Vector3.North,
TexCoord = new Vector2(0, 0)
};
vb[10] = new VertexPositionTexCoordNormal()
{
Position = pos[1],
Normal = Vector3.North,
TexCoord = new Vector2(0, 0)
};
vb[11] = new VertexPositionTexCoordNormal()
{
Position = pos[0],
Normal = Vector3.North,
TexCoord = new Vector2(0, 0)
};
vb[12] = new VertexPositionTexCoordNormal()
{
Position = pos[0],
Normal = Vector3.West,
TexCoord = new Vector2()
};
vb[13] = new VertexPositionTexCoordNormal()
{
Position = pos[3],
Normal = Vector3.West,
TexCoord = new Vector2()
};
vb[14] = new VertexPositionTexCoordNormal()
{
Position = pos[7],
Normal = Vector3.West,
TexCoord = new Vector2()
};
vb[15] = new VertexPositionTexCoordNormal()
{
Position = pos[4],
Normal = Vector3.West,
TexCoord = new Vector2()
};
vb[16] = new VertexPositionTexCoordNormal()
{
Position = pos[3],
Normal = Vector3.South,
TexCoord = new Vector2()
};
vb[17] = new VertexPositionTexCoordNormal()
{
Position = pos[2],
Normal = Vector3.South,
TexCoord = new Vector2()
};
vb[18] = new VertexPositionTexCoordNormal()
{
Position = pos[6],
Normal = Vector3.South,
TexCoord = new Vector2()
};
vb[19] = new VertexPositionTexCoordNormal()
{
Position = pos[7],
Normal = Vector3.South,
TexCoord = new Vector2()
};
vb[23] = new VertexPositionTexCoordNormal()
{
Position = pos[1],
Normal = Vector3.East,
TexCoord = new Vector2()
};
vb[22] = new VertexPositionTexCoordNormal()
{
Position = pos[2],
Normal = Vector3.East,
TexCoord = new Vector2()
};
vb[21] = new VertexPositionTexCoordNormal()
{
Position = pos[6],
Normal = Vector3.East,
TexCoord = new Vector2()
};
vb[20] = new VertexPositionTexCoordNormal()
{
Position = pos[5],
Normal = Vector3.East,
TexCoord = new Vector2()
};
int offset = 0;
ib.Allocate(36);
for (int i = 0; i < 6; i++)
{
offset = AddFaces(i * 4, offset, ib);
}
vb.BufferData(Glorg2.Graphics.OpenGL.VboUsage.GL_STATIC_DRAW);
ib.BufferData(Glorg2.Graphics.OpenGL.VboUsage.GL_STATIC_DRAW);
return ret;
}
