public static void SphereTextured(double r, int lats, int longs, Vector3 center)
{
for (var i = 0; i <= lats; i++)
{
double lat0 = Math.PI * (-0.5 + (double)(i - 1) / lats);
double z0 = r * Math.Sin(lat0);
double zr0 = r * Math.Cos(lat0);
double lat1 = Math.PI * (-0.5 + (double)i / lats);
double z1 = r * Math.Sin(lat1);
double zr1 = r * Math.Cos(lat1);
using (GLDraw.Begin(BeginMode.Quads))
{
for (var j = 0; j <= longs; j++)
{
double lng = 2 * Math.PI * (double)(j - 1) / longs;
double x = Math.Cos(lng);
double y = Math.Sin(lng);
GL.TexCoord2((i * 2f) / (lats * 2 + 2), (j * 2f) / (longs * 2 + 2));
GL.Normal3(x * zr0, y * zr0, z0);
GL.Vertex3(x * zr0 + center.X, y * zr0 + center.Y, z0 + center.Z);
GL.TexCoord2((i * 2f + 1) / (lats * 2 + 2), (j * 2f) / (longs * 2 + 2));
GL.Normal3(x * zr1, y * zr1, z1);
GL.Vertex3(x * zr1 + center.X, y * zr1 + center.Y, z1 + center.Z);
}
}
}
}
public static void Sphere(double r, int lats, int longs, Vector3 center)
{
int i, j;
for (i = 0; i <= lats; i++)
{
double lat0 = Math.PI * (-0.5 + (double)(i - 1) / lats);
double z0 = r * Math.Sin(lat0);
double zr0 = r * Math.Cos(lat0);
double lat1 = Math.PI * (-0.5 + (double)i / lats);
double z1 = r * Math.Sin(lat1);
double zr1 = r * Math.Cos(lat1);
using (GLDraw.Begin(BeginMode.QuadStrip))
{
for (j = 0; j <= longs; j++)
{
double lng = 2 * Math.PI * (double)(j - 1) / longs;
double x = Math.Cos(lng);
double y = Math.Sin(lng);
GL.Normal3(x * zr0, y * zr0, z0);
GL.Vertex3(x * zr0 + center.X, y * zr0 + center.Y, z0 + center.Z);
GL.Normal3(x * zr1, y * zr1, z1);
GL.Vertex3(x * zr1 + center.X, y * zr1 + center.Y, z1 + center.Z);
}
}
}
}
public static void Plane(double width_2, double height_2)
{
using (GLDraw.Begin(BeginMode.Quads))
{
// front face
GL.Normal3(0, 0, 1);
GL.TexCoord2(1, 0); GL.Vertex3(width_2, height_2, 0);
GL.TexCoord2(1, 1); GL.Vertex3(width_2, -height_2, 0);
GL.TexCoord2(0, 1); GL.Vertex3(-width_2, -height_2, 0);
GL.TexCoord2(0, 0); GL.Vertex3(-width_2, height_2, 0);
}
}
public static void Plane(double width_2, double height_2, double textureStretch)
{
float t = (float)textureStretch;
using (GLDraw.Begin(BeginMode.Quads))
{
// front face
GL.Normal3(0, 0, 1);
GL.TexCoord2(1 + t, 1 + t); GL.Vertex3(width_2, height_2, 0);
GL.TexCoord2(1 + t, -t); GL.Vertex3(width_2, -height_2, 0);
GL.TexCoord2(-t, -t); GL.Vertex3(-width_2, -height_2, 0);
GL.TexCoord2(-t, 1 + t); GL.Vertex3(-width_2, height_2, 0);
}
}
public static void Cube(float x1, float y1, float z1, float x2, float y2, float z2)
{
using (GLDraw.Begin(BeginMode.Quads))
{
GLHelpers.Color4(Colors.Silver);
GL.Vertex3(x1, y1, z1);
GL.Vertex3(x1, y2, z1);
GL.Vertex3(x2, y2, z1);
GL.Vertex3(x2, y1, z1);
GLHelpers.Color4(Colors.Honeydew);
GL.Vertex3(x1, y1, z1);
GL.Vertex3(x2, y1, z1);
GL.Vertex3(x2, y1, z2);
GL.Vertex3(x1, y1, z2);
GLHelpers.Color4(Colors.Moccasin);
GL.Vertex3(x1, y1, z1);
GL.Vertex3(x1, y1, z2);
GL.Vertex3(x1, y2, z2);
GL.Vertex3(x1, y2, z1);
GLHelpers.Color4(Colors.SkyBlue);
GL.Vertex3(x1, y1, z2);
GL.Vertex3(x2, y1, z2);
GL.Vertex3(x2, y2, z2);
GL.Vertex3(x1, y2, z2);
GLHelpers.Color4(Colors.PaleVioletRed);
GL.Vertex3(x1, y2, z1);
GL.Vertex3(x1, y2, z2);
GL.Vertex3(x2, y2, z2);
GL.Vertex3(x2, y2, z1);
GLHelpers.Color4(Colors.ForestGreen);
GL.Vertex3(x2, y1, z1);
GL.Vertex3(x2, y2, z1);
GL.Vertex3(x2, y2, z2);
GL.Vertex3(x2, y1, z2);
}
}
/// <summary>Make a cube with normals and 2D texture coordinates</summary>
/// <param name="width"></param>
public static void Cube2D(double width)
{
var w = width / 2;
using (GLDraw.Begin(BeginMode.Quads))
{
// back face
GL.Normal3(0, 0, -w); GL.TexCoord2(1, 1); GL.Vertex3(w, w, -w);
GL.Normal3(0, 0, -w); GL.TexCoord2(1, 0); GL.Vertex3(w, -w, -w);
GL.Normal3(0, 0, -w); GL.TexCoord2(0, 0); GL.Vertex3(-w, -w, -w);
GL.Normal3(0, 0, -w); GL.TexCoord2(0, 1); GL.Vertex3(-w, w, -w);
// bottom face
GL.Normal3(0, -w, 0); GL.TexCoord2(1, 1); GL.Vertex3(w, -w, w);
GL.Normal3(0, -w, 0); GL.TexCoord2(1, 0); GL.Vertex3(-w, -w, w);
GL.Normal3(0, -w, 0); GL.TexCoord2(0, 0); GL.Vertex3(-w, -w, -w);
GL.Normal3(0, -w, 0); GL.TexCoord2(0, 1); GL.Vertex3(w, -w, -w);
// top face
GL.Normal3(0, w, 0); GL.TexCoord2(1, 1); GL.Vertex3(w, w, w);
GL.Normal3(0, w, 0); GL.TexCoord2(1, 0); GL.Vertex3(-w, w, w);
GL.Normal3(0, w, 0); GL.TexCoord2(0, 0); GL.Vertex3(-w, w, -w);
GL.Normal3(0, w, 0); GL.TexCoord2(0, 1); GL.Vertex3(w, w, -w);
// left face
GL.Normal3(-w, 0, 0); GL.TexCoord2(1, 1); GL.Vertex3(-w, w, w);
GL.Normal3(-w, 0, 0); GL.TexCoord2(1, 0); GL.Vertex3(-w, w, -w);
GL.Normal3(-w, 0, 0); GL.TexCoord2(0, 0); GL.Vertex3(-w, -w, -w);
GL.Normal3(-w, 0, 0); GL.TexCoord2(0, 1); GL.Vertex3(-w, -w, w);
// right face
GL.Normal3(w, 0, 0); GL.TexCoord2(1, 1); GL.Vertex3(w, w, w);
GL.Normal3(w, 0, 0); GL.TexCoord2(1, 0); GL.Vertex3(w, w, -w);
GL.Normal3(w, 0, 0); GL.TexCoord2(0, 0); GL.Vertex3(w, -w, -w);
GL.Normal3(w, 0, 0); GL.TexCoord2(0, 1); GL.Vertex3(w, -w, w);
// front face
GL.Normal3(0, 0, w); GL.TexCoord2(1, 1); GL.Vertex3(w, w, w);
GL.Normal3(0, 0, w); GL.TexCoord2(1, 0); GL.Vertex3(w, -w, w);
GL.Normal3(0, 0, w); GL.TexCoord2(0, 0); GL.Vertex3(-w, -w, w);
GL.Normal3(0, 0, w); GL.TexCoord2(0, 1); GL.Vertex3(-w, w, w);
}
}
public static void PlaneMesh(float width, float height, int meshSize, float z)
{
float x = -width;
float y = height;
float dX = width * 2f / meshSize;
float dY = -height * 2f / meshSize;
GL.Normal3(0, 0, 1);
for (int i = 0; i < meshSize; i++)
{
y = height;
using (GLDraw.Begin(BeginMode.QuadStrip))
{
for (int j = 0; j < meshSize + 1; j++)
{
GL.TexCoord2(i / (float)meshSize, j / (float)meshSize); GL.Vertex3(x, y, z);
GL.TexCoord2((i + 1) / (float)meshSize, j / (float)meshSize); GL.Vertex3(x + dX, y, z);
y += dY;
}
}
x += dX;
}
}
