private void InitData()
{
// Get the OpenGL object.
OpenGL gl = openGLControl.OpenGL;
blob = new TBlob();
blob.Triangle = new TTriangle[numTriangles];
blob.vertex = new TVertex[numVertices];
obj = new TBlob();
obj.Triangle = new TTriangle[numTriangles];
obj.vertex = new TVertex[numVertices];
sphere = new TBlob();
sphere.vertex = new TVertex[numVertices];
for (int i = 0; i < numTriangles; i++)
{
blob.Triangle[i].T = new TTexCoord[3];
blob.Triangle[i].v = new int[3];
obj.Triangle[i].T = new TTexCoord[3];
obj.Triangle[i].v = new int[3];
}
CreateSphere(ref blob);
// Copy the verts from blob into the sphere & object
int count = 0;
foreach (TVertex vertex in blob.vertex)
{
sphere.vertex[count] = vertex;
obj.vertex[count] = vertex;
count += 1;
}
count = 0;
foreach (TTriangle triangle in blob.Triangle)
{
obj.Triangle[count++] = triangle;
}
for (int i = 0; i < numVertices; i++)
{
LU[i].X = ArcTan(sphere.vertex[i].X, sphere.vertex[i].Y) * 5;
LU[i].Y = ArcTan(sphere.vertex[i].X, sphere.vertex[i].Z) * 6;
LU[i].Z = ArcTan(sphere.vertex[i].Y, sphere.vertex[i].Z) * 8;
}
// Initialise tentacles
CubeDL = gl.GenLists(1);
gl.NewList(CubeDL, OpenGL.GL_COMPILE);
gl.Begin(OpenGL.GL_QUADS);
// Front Face
gl.TexCoord(0.0, 0.0); gl.Vertex(-1.0, -1.0, 1.0);
gl.TexCoord(1.0, 0.0); gl.Vertex(1.0, -1.0, 1.0);
gl.TexCoord(1.0, 1.0); gl.Vertex(1.0, 1.0, 1.0);
gl.TexCoord(0.0, 1.0); gl.Vertex(-1.0, 1.0, 1.0);
// Back Face
gl.TexCoord(1.0, 0.0); gl.Vertex(-1.0, -1.0, -1.0);
gl.TexCoord(1.0, 1.0); gl.Vertex(-1.0, 1.0, -1.0);
gl.TexCoord(0.0, 1.0); gl.Vertex(1.0, 1.0, -1.0);
gl.TexCoord(0.0, 0.0); gl.Vertex(1.0, -1.0, -1.0);
// Top Face
gl.TexCoord(0.0, 1.0); gl.Vertex(-1.0, 1.0, -1.0);
gl.TexCoord(0.0, 0.0); gl.Vertex(-1.0, 1.0, 1.0);
gl.TexCoord(1.0, 0.0); gl.Vertex(1.0, 1.0, 1.0);
gl.TexCoord(1.0, 1.0); gl.Vertex(1.0, 1.0, -1.0);
// Bottom Face
gl.TexCoord(1.0, 1.0); gl.Vertex(-1.0, -1.0, -1.0);
gl.TexCoord(0.0, 1.0); gl.Vertex(1.0, -1.0, -1.0);
gl.TexCoord(0.0, 0.0); gl.Vertex(1.0, -1.0, 1.0);
gl.TexCoord(1.0, 0.0); gl.Vertex(-1.0, -1.0, 1.0);
// Right face
gl.TexCoord(1.0, 0.0); gl.Vertex(1.0, -1.0, -1.0);
gl.TexCoord(1.0, 1.0); gl.Vertex(1.0, 1.0, -1.0);
gl.TexCoord(0.0, 1.0); gl.Vertex(1.0, 1.0, 1.0);
gl.TexCoord(0.0, 0.0); gl.Vertex(1.0, -1.0, 1.0);
// Left Face
gl.TexCoord(0.0, 0.0); gl.Vertex(-1.0, -1.0, -1.0);
gl.TexCoord(1.0, 0.0); gl.Vertex(-1.0, -1.0, 1.0);
gl.TexCoord(1.0, 1.0); gl.Vertex(-1.0, 1.0, 1.0);
gl.TexCoord(0.0, 1.0); gl.Vertex(-1.0, 1.0, -1.0);
gl.End();
gl.EndList();
}
//{------------------------------------------------------------------}
//{ Function to create a sphere }
//{------------------------------------------------------------------}
private void CreateSphere(ref TBlob obj)
{
const int r = 10;
int yRing = yRows * (4 + 4);
float uTex = 3.0f / (xRows);
float vTex = 3.0f / ((3 + 2) * yRows);
float yLevel = 0;
float radius = 0;
int offset = 0;
// Top center
obj.vertex[0].X = 0;
obj.vertex[0].Z = 0;
obj.vertex[0].Y = -r;
offset = 1;
// Top half and center
for (int y = 0; y < yRows + 1; y++)
{
yLevel = (float)(-r * Math.Cos(2 * Math.PI * (y + 1) / yRing));
radius = (float)(r * Math.Sin(2 * Math.PI * (y + 1) / yRing));
for (int x = 0; x < xRows; x++)
{
obj.vertex[offset].X = (float)(radius * Math.Sin(2 * Math.PI * x / xRows));
obj.vertex[offset].Z = (float)(radius * Math.Cos(2 * Math.PI * x / xRows));
obj.vertex[offset].Y = yLevel;
offset++;
}
}
// Bottom half
for (int y = 0; y < yRows; y++)
{
yLevel = (float)(r * Math.Sin(2 * Math.PI * (y + 1) / yRing));
radius = (float)(r * Math.Cos(2 * Math.PI * (y + 1) / yRing));
for (int x = 0; x < xRows; x++)
{
obj.vertex[offset].X = (float)(radius * Math.Sin(2 * Math.PI * x / xRows));
obj.vertex[offset].Z = (float)(radius * Math.Cos(2 * Math.PI * x / xRows));
obj.vertex[offset].Y = yLevel;
offset++;
}
}
// Bottom center
obj.vertex[offset].X = 0;
obj.vertex[offset].Z = 0;
obj.vertex[offset].Y = r;
for (int i = 0; i < xRows; i++)
{
obj.Triangle[i].v[0] = 0;
obj.Triangle[i].v[1] = (i + 1) % xRows + 1;
obj.Triangle[i].v[2] = (i + 1);
obj.Triangle[i].T[0].U = 0.5f;
obj.Triangle[i].T[0].V = 0.0f;
obj.Triangle[i].T[1].U = (i + 1) * uTex;
obj.Triangle[i].T[1].V = vTex;
obj.Triangle[i].T[2].U = i * uTex;
obj.Triangle[i].T[2].V = vTex;
}
for (int j = 0; j < yRows * 2; j++)
{
for (int i = 0; i < xRows; i++)
{
offset = xRows + (i + j * xRows) * 2;
obj.Triangle[offset].v[0] = j * xRows + 1 + i;
obj.Triangle[offset].v[1] = j * xRows + 1 + (i + 1) % xRows;
obj.Triangle[offset].v[2] = j * xRows + 1 + i + xRows;
obj.Triangle[offset].T[0].U = i * uTex;
obj.Triangle[offset].T[0].V = (1 + j) * vTex;
obj.Triangle[offset].T[1].U = (1 + i) * uTex;
obj.Triangle[offset].T[1].V = (1 + j) * vTex;
obj.Triangle[offset].T[2].U = i * uTex;
obj.Triangle[offset].T[2].V = (2 + j) * vTex;
offset = xRows + (i + j * xRows) * 2 + 1;
obj.Triangle[offset].v[0] = j * xRows + 1 + (i + 1) % xRows;
obj.Triangle[offset].v[1] = j * xRows + 1 + (i + 1) % xRows + xRows;
obj.Triangle[offset].v[2] = j * xRows + 1 + i + xRows;
obj.Triangle[offset].T[0].U = (i + 1) * uTex;
obj.Triangle[offset].T[0].V = (1 + j) * vTex;
obj.Triangle[offset].T[1].U = (i + 1) * uTex;
obj.Triangle[offset].T[1].V = (2 + j) * vTex;
obj.Triangle[offset].T[2].U = i * uTex;
obj.Triangle[offset].T[2].V = (2 + j) * vTex;
}
for (int i = 0; i < xRows; i++)
{
offset = xRows + xRows * 2 * yRows * 2 + i;
obj.Triangle[offset].v[0] = 2 * yRows * xRows + 1 + i;
obj.Triangle[offset].v[1] = 2 * yRows * xRows + 1 + (i + 1) % xRows;
obj.Triangle[offset].v[2] = 2 * yRows * xRows + 1 + xRows;
obj.Triangle[offset].T[0].U = i * uTex;
obj.Triangle[offset].T[0].V = (yRows * 2 + 1) * vTex;
obj.Triangle[offset].T[1].U = (i + 1) * uTex;
obj.Triangle[offset].T[1].V = (yRows * 2 + 1) * vTex;
obj.Triangle[offset].T[2].U = 0.5f;
obj.Triangle[offset].T[2].V = 1.0f;
}
}
// Calculate Normals
for (int i = 0; i < numTriangles - 1; i++)
{
TVertex[] v = new TVertex[3];
v[0] = obj.vertex[obj.Triangle[i].v[0]];
v[1] = obj.vertex[obj.Triangle[i].v[1]];
v[2] = obj.vertex[obj.Triangle[i].v[2]];
obj.Triangle[i].n = calcNormal(v);
}
}
