private Vector calculateReflectedVec(Vector light, Vector normal)
{
float up = VectorOperations.ScalarMultiplication(light, normal);
float bottom = VectorOperations.ScalarMultiplication(normal, normal);
float division = up / bottom;
Vector right = new Vector(2 * division * normal.X, 2 * division * normal.Y, 2 * division * normal.Z);
Vector reflectedVec = VectorOperations.Diff(light, right);
return(reflectedVec);
}
private Vector calculateLightCos(Vector colorVecM, Vector colorVecL, Vector vecLight, Vector vecNormal, Vector vecReflected, Vector vecViewer, float shining)
{
float r = colorVecM.X * colorVecL.X + VectorOperations.CalculateCos(vecLight, vecNormal) + (float)Math.Pow((VectorOperations.CalculateCos(vecReflected, vecViewer)), shining);
float g = colorVecM.Y * colorVecL.Y + VectorOperations.CalculateCos(vecLight, vecNormal) + (float)Math.Pow((VectorOperations.CalculateCos(vecReflected, vecViewer)), shining);
float b = colorVecM.Z * colorVecL.Z + VectorOperations.CalculateCos(vecLight, vecNormal) + (float)Math.Pow((VectorOperations.CalculateCos(vecReflected, vecViewer)), shining);
r = (r > 1) ? 1.0f : r;
g = (g > 1) ? 1.0f : g;
b = (b > 1) ? 1.0f : b;
return(new Vector(r, g, b));
}
private void openGLControl1_OpenGLDraw(object sender, SharpGL.RenderEventArgs args)
{
float u = 0;
float v = 0;
float deltaU = 0.01f;
float deltaV = 0.01f;
float step = 0.1f;
float endU = 1.0f;
float endV = 1.0f;
float c = 0.2f;
float x = 0, y = 0, z = 0;
float b = 0.5f, a = 1.0f, p = 3.0f;
float[] light_specular_color = { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light_ambient_color = { 0.0f, 0.39f, 0.0f, 1.0f };
float[] light_diffuse_color = { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light_position = { 100.0f, 2.0f, -100.0f, 0.0f };
float[] positional_light = { 10.0f, 100.0f, -20.0f };
Vector vecColorM = new Vector(1.0f, 0.0f, 0.0f); //blue
Vector vecColorL = new Vector(1.0f, 1.0f, 1.0f); //white
//Vector vecLight = new Vector(50.0f, 1.0f, 0.0f);
Vector vecViewer = new Vector(-20.0f, 4.0f, -10.0f);
Vector normal;
Vector light;
Vector vecReflected;
Vector vecLight = new Vector(0, 0, 0);
float shining = 1.0f;
OpenGL gl = this.openGLControl1.OpenGL;
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.LoadIdentity();
gl.Color(0.0, 0.0, 1.0);
gl.Translate(0, 2.0, -20);
gl.Rotate(angx, 0, angx);
gl.PolygonMode(SharpGL.Enumerations.FaceMode.FrontAndBack, SharpGL.Enumerations.PolygonMode.Filled);
angx += 0.5f;
//gl.Enable(OpenGL.GL_LIGHTING);
//gl.Enable(OpenGL.GL_LIGHT0);
//gl.Enable(OpenGL.GL_NORMALIZE);
//gl.Light(SharpGL.Enumerations.LightName.Light0, SharpGL.Enumerations.LightParameter.Ambient, light_ambient_color);
//gl.Light(SharpGL.Enumerations.LightName.Light0, SharpGL.Enumerations.LightParameter.Diffuse, light_diffuse_color);
//gl.Light(SharpGL.Enumerations.LightName.Light0, SharpGL.Enumerations.LightParameter.Specular, light_specular_color);
//gl.Light(SharpGL.Enumerations.LightName.Light0, SharpGL.Enumerations.LightParameter.Position, light_position);
for (u = 0; u <= 4.0 * Math.PI; u += step)
{
gl.Begin(OpenGL.GL_TRIANGLE_STRIP);
float f = 0;
for (v = 5.0f; v <= 7.0f; v += step)
{
x = (v * (float)Math.Cos(u));
y = (v * (float)Math.Sin(u));
z = b * u + a * (float)Math.Sin(p * u);
normal = VectorOperations.GetNormal(u, v, deltaU, deltaV, a, b, p);
//gl.Normal(normal.X, normal.Y, normal.Z);
vecReflected = calculateReflectedVec(vecLight, normal);
vecLight.X = (x - positional_light[0]);
vecLight.Y = (y - positional_light[1]);
vecLight.Z = (z - positional_light[2]);
light = calculateLightCos(vecColorM, vecColorL, vecLight, normal, vecReflected, vecViewer, shining);
gl.Color(light.X, light.Y, light.Z);
gl.Vertex(x, y, z);
x = (v * (float)Math.Cos(u + step));
y = (v * (float)Math.Sin(u + step));
z = b * (u + step) + a * (float)Math.Sin(p * (u + step));
normal = VectorOperations.GetNormal((u + step), v, deltaU, deltaV, a, b, p);
//gl.Normal(normal.X, normal.Y, normal.Z);
vecReflected = calculateReflectedVec(vecLight, normal);
vecLight.X = (x - positional_light[0]);
vecLight.Y = (y - positional_light[1]);
vecLight.Z = (z - positional_light[2]);
light = calculateLightCos(vecColorM, vecColorL, vecLight, normal, vecReflected, vecViewer, shining);
gl.Color(light.X, light.Y, light.Z);
gl.Vertex(x, y, z);
}
gl.End();
}
Axies ax = new Axies();
ax.Render(gl, SharpGL.SceneGraph.Core.RenderMode.Design);
gl.Flush();
}
