private void AddSphete(float r, Vector3 center, Vector3 scale, String imagePath)
{
ShaderSimple sh = new ShaderSimple();
// add to list the sphere
sphere_info spi = new sphere_info();
spi.sh = sh;
spi.r = r * scale.X*1.5f;
spi.center = center;
listSphere.Add(spi);
// add the textures for the shader
sh.SetTexture(imagePath, TextureType.Diffuse);
sh.SetTexture(imagePath, TextureType.Lightmap);
sh.SetTexture("Resources/height.jpg", TextureType.Heightmap);
ShaderManager.AddShader("Shader" + r.ToString(), sh);
List<Polygon> polygonList = new List<Polygon>();
float numSteps = 100;
float thita_step = (float)(Math.PI / numSteps);
float phi_step = (float)(2 * Math.PI / numSteps);
for (float thita = 0; thita < Math.PI; thita += thita_step)
{
for (float phi = 0; phi < 2 * Math.PI; phi += phi_step)
{
float x = (float)(r * Math.Sin(thita) * Math.Cos(phi));
float y = (float)(r * Math.Sin(thita) * Math.Sin(phi));
float z = (float)(r * Math.Cos(thita));
float u = (float)(thita / (Math.PI));
float v = (float)(phi / (2 * Math.PI));
Vertex ver1A = new Vertex(x, z, y, 0, 0, 0, v, u);
x = (float)(r * Math.Sin(thita) * Math.Cos(phi + phi_step));
y = (float)(r * Math.Sin(thita) * Math.Sin(phi + phi_step));
z = (float)(r * Math.Cos(thita));
u = (float)(thita / (Math.PI));
v = (float)((phi + phi_step) / (2 * Math.PI));
Vertex ver2A = new Vertex(x, z, y, 0, 0, 0, v, u);
x = (float)(r * Math.Sin(thita + thita_step) * Math.Cos(phi + phi_step));
y = (float)(r * Math.Sin(thita + thita_step) * Math.Sin(phi + phi_step));
z = (float)(r * Math.Cos(thita + thita_step));
u = (float)((thita + thita_step) / (Math.PI));
v = (float)((phi + phi_step) / (2 * Math.PI));
Vertex ver3A = new Vertex(x, z, y, 0, 0, 0, v, u);
x = (float)(r * Math.Sin(thita + thita_step) * Math.Cos(phi));
y = (float)(r * Math.Sin(thita + thita_step) * Math.Sin(phi));
z = (float)(r * Math.Cos(thita + thita_step));
u = (float)((thita + thita_step) / (Math.PI));
v = (float)((phi) / (2 * Math.PI));
Vertex ver4A = new Vertex(x, z, y, 0, 0, 0, v, u);
polygonList.Add(new Polygon(ver1A, ver2A, ver3A));
polygonList.Add(new Polygon(ver1A, ver3A, ver4A));
}
}
Mesh mesh = new Mesh();
/// set to the new mesh the shader
mesh.m_shader = sh;
// set the position
mesh.SetPosition(center);
// scale it
mesh.SetScale(scale);
// add the polygons on mesh
foreach (Polygon poly in polygonList)
{
// add the polygons to the mesh
mesh.AddPolygon(poly, false);
}
/// create the mesh and download it to the card
mesh.CreateMesh();
/// add the mesh to the engine mesh list
Engine.g_MeshManager.AddMesh(mesh);
sh.SetVariables(new Vector3(1, 1, 1), ShaderViariables.Ambient);
}
void t_Tick(object sender, EventArgs e)
{
selected_sphere = null;
foreach (sphere_info spi in listSphere)
{
Vector3 x0 = spi.center;
Vector3 x1 = Engine.g_MoveCamera.LookAt;
Vector3 x2 = Engine.g_MoveCamera.Eye;
Vector3 sub1 = Vector3.Subtract(x0, x1);
Vector3 sub2 = Vector3.Subtract(x0, x2);
Vector3 sub3 = Vector3.Subtract(x2, x1);
Vector3 d_arith = Vector3.Cross(sub1, sub2);
float dis = (d_arith.Length() / sub3.Length());
if (dis < spi.r)
{
spi.sh.SetVariables(new Vector3(1.0f, 0.5f, 0.5f), ShaderViariables.Ambient);
selected_sphere = spi;
}
else
{
spi.sh.SetVariables(new Vector3(1, 1, 1), ShaderViariables.Ambient);
}
}
}