public unsafe SkyBox(Device dev)
{
device = dev;
// sqrt(3)/3
const float l = 1f / MathEx.Root3;
vtxDecl = new VertexDeclaration(device, D3DX.DeclaratorFromFVF(SkyVertex.Format));
box = new VertexBuffer(dev, sizeof(SkyVertex) * 8, Usage.WriteOnly, VertexPT1.Format, Pool.Managed);
SkyVertex *dst = (SkyVertex *)box.Lock(0, 0, LockFlags.None).DataPointer.ToPointer();
dst[0] = new SkyVertex {
pos = new Vector3(-50f, -50f, -50f), texCoord = new Vector3(-l, -l, -l)
};
dst[1] = new SkyVertex {
pos = new Vector3(50f, -50f, -50f), texCoord = new Vector3(l, -l, -l)
};
dst[2] = new SkyVertex {
pos = new Vector3(-50f, -50f, 50f), texCoord = new Vector3(-l, -l, l)
};
dst[3] = new SkyVertex {
pos = new Vector3(50f, -50f, 50f), texCoord = new Vector3(l, -l, l)
};
dst[4] = new SkyVertex {
pos = new Vector3(-50f, 50f, -50f), texCoord = new Vector3(-l, l, -l)
};
dst[5] = new SkyVertex {
pos = new Vector3(50f, 50f, -50f), texCoord = new Vector3(l, l, -l)
};
dst[6] = new SkyVertex {
pos = new Vector3(-50f, 50f, 50f), texCoord = new Vector3(-l, l, l)
};
dst[7] = new SkyVertex {
pos = new Vector3(50f, 50, 50f), texCoord = new Vector3(l, l, l)
};
box.Unlock();
indexBuffer = new IndexBuffer(dev, sizeof(ushort) * 36, Usage.WriteOnly, Pool.Managed, true);
ushort *ibDst = (ushort *)indexBuffer.Lock(0, 0, LockFlags.None).DataPointer.ToPointer();
ibDst[0] = 0;
ibDst[1] = 1;
ibDst[2] = 3;
ibDst[3] = 0;
ibDst[4] = 3;
ibDst[5] = 2;
ibDst[6] = 0;
ibDst[7] = 4;
ibDst[8] = 5;
ibDst[9] = 0;
ibDst[10] = 5;
ibDst[11] = 1;
ibDst[12] = 2;
ibDst[13] = 6;
ibDst[14] = 4;
ibDst[15] = 2;
ibDst[16] = 4;
ibDst[17] = 0;
ibDst[18] = 3;
ibDst[19] = 7;
ibDst[20] = 6;
ibDst[21] = 3;
ibDst[22] = 6;
ibDst[23] = 2;
ibDst[24] = 1;
ibDst[25] = 5;
ibDst[26] = 7;
ibDst[27] = 1;
ibDst[28] = 7;
ibDst[29] = 3;
ibDst[30] = 6;
ibDst[31] = 7;
ibDst[32] = 5;
ibDst[33] = 6;
ibDst[34] = 5;
ibDst[35] = 4;
//ibDst[0] = 0;
//ibDst[1] = 1;
//ibDst[2] = 3;
//ibDst[3] = 0;
//ibDst[4] = 2;
//ibDst[5] = 3;
//ibDst[6] = 4;
//ibDst[7] = 5;
//ibDst[8] = 7;
//ibDst[9] = 4;
//ibDst[10] = 6;
//ibDst[11] = 7;
//ibDst[12] = 0;
//ibDst[13] = 1;
//ibDst[14] = 4;
//ibDst[15] = 1;
//ibDst[16] = 4;
//ibDst[17] = 5;
//ibDst[18] = 0;
//ibDst[19] = 4;
//ibDst[20] = 2;
//ibDst[21] = 4;
//ibDst[22] = 6;
//ibDst[23] = 2;
//ibDst[24] = 1;
//ibDst[25] = 3;
//ibDst[26] = 5;
//ibDst[27] = 5;
//ibDst[28] = 7;
//ibDst[29] = 3;
//ibDst[30] = 2;
//ibDst[31] = 3;
//ibDst[32] = 6;
//ibDst[33] = 2;
//ibDst[34] = 7;
//ibDst[35] = 3;
indexBuffer.Unlock();
FileLocation fl = FileSystem.Instance.Locate(FileSystem.CombinePath(Paths.Effects, "DayNight.fx"), FileLocateRules.Default);
ContentStreamReader sr = new ContentStreamReader(fl);
string code = sr.ReadToEnd();
string err;
effect = Effect.FromString(device, code, null, IncludeHandler.Instance, null, ShaderFlags.None, null, out err);
effect.Technique = new EffectHandle("DayNight");
nightAlpha = new EffectHandle("nightAlpha");
day = new EffectHandle("Day");
night = new EffectHandle("Night");
}
private void genVertices(int phiSteps, int thetaSteps)
{
int nVerts = 3 * (phiSteps - thetaSteps + 1); // triangle fan
triStrips = new int[thetaSteps];
this.phiSteps = phiSteps;
this.thetaSteps = thetaSteps;
int phiRes = phiSteps - thetaSteps + 1;
for(int i=0; i<thetaSteps; i++)
{
nVerts += 2*(phiRes+1) + 1; // triangle strip
phiRes++;
triStrips[i] = 2*(phiRes+1) - 1;
}
vertexDecl = new VertexDeclaration(SkyVertex.VertexElements);
SkyVertex[] verts = new SkyVertex[nVerts];
int idx = 0;
int res = phiSteps - thetaSteps + 1;
float phiStep = 2 * (float)Math.PI / (float)res;
float thetaStep = 0.5f * (float)Math.PI / (float)thetaSteps;
float phi = 0;
for(int i=0; i<res; i++) // triangle fan
{
verts[idx++] = new SkyVertex(0, 1, 0, phi, 0); // triangle fan
verts[idx++] = new SkyVertex(phi, thetaStep);
verts[idx++] = new SkyVertex(phi + phiStep, thetaStep);
phi += phiStep;
}
phiRes = phiSteps - thetaSteps + 1;
float theta = thetaStep;
for(int i=0; i<thetaSteps-1; i++) // triangle strips
{
float phiDown = 0;
float phiUp = 0;
for(int j=0; j<phiRes+1; j++)
{
verts[idx++] = new SkyVertex(phiDown, theta + thetaStep);
verts[idx++] = new SkyVertex(phiUp, theta);
phiDown += 2 * (float)Math.PI / (float)(phiRes+1);
phiUp += 2 * (float)Math.PI / (float)phiRes;
}
verts[idx++] = new SkyVertex(2 * (float)Math.PI, theta + thetaStep);
theta += thetaStep;
phiRes++;
}
vBuffer = new VertexBuffer(device, vertexDecl, nVerts, BufferUsage.WriteOnly);
vBuffer.SetData(verts);
}
