protected override void Initialise()
{
camera = new Camera3D();
//create the draw target.
drawToScreen = new DrawTargetScreen(this, camera);
//clear to dark blue
drawToScreen.ClearBuffer.ClearColour = new Color(20, 20, 40);
//create the light collection
lights = new MaterialLightCollection();
//set a dark blue ambient colour
lights.AmbientLightColour = new Color(40, 40, 80).ToVector3();
//positions for two lights
Vector3[] lightPositions = new Vector3[]
{
new Vector3(0, 30, 2),
new Vector3(0, -30, 2)
};
//geometry for a light (shared for each light)
IDraw lightGeometry = null;
for (int i = 0; i < lightPositions.Length; i++)
{
float lightHalfFalloffDistance = 15;
Color lightColor = Color.LightYellow;
Color lightSpecularColour = Color.WhiteSmoke;
bool perPixel = i < 2; //first two lights are per-pixel
//interface to the light about to be created
IMaterialPointLight light = null;
//create the point light
light = lights.AddPointLight(perPixel, lightPositions[i], lightHalfFalloffDistance, lightColor, lightSpecularColour);
//adjust the lighting attenuation model, the constant defaults to 1, which prevents the light being brighter than 1.0 in the falloff equation
//set to 0.25, the light will get really bright in close (up to 4)
//(see light.QuadraticAttenuation remarks for an explanation of the falloff model)
light.ConstantAttenuation = 0.25f;
//create the light geometry (a sphere)
if (lightGeometry == null)
{
lightGeometry = new Xen.Ex.Geometry.Sphere(Vector3.One, 8, true, false, false);
}
//visually show the light with a light drawer
IDraw lightSourceDrawer = new LightSourceDrawer(lightPositions[i], lightGeometry, lightColor);
//add the light geometry to the screen
drawToScreen.Add(lightSourceDrawer);
}
//create the ground disk
GroundDisk ground = new GroundDisk(this.Content, lights, diskRadius);
//then add it to the screen
drawToScreen.Add(ground);
}
protected override void Initialise()
{
camera = new Camera3D();
//create the draw target.
drawToScreen = new DrawTargetScreen(camera);
//clear to dark blue
drawToScreen.ClearBuffer.ClearColour = new Color(20, 20, 40);
//create the light collection
lights = new MaterialLightCollection();
//set a dark blue ambient colour
lights.AmbientLightColour = new Color(40, 40, 80).ToVector3();
//positions for two lights
Vector3[] lightPositions = new Vector3[]
{
new Vector3(0, 30, 4),
new Vector3(0, -30, 4)
};
//geometry for a light (shared for each light)
IDraw lightGeometry = null;
for (int i = 0; i < lightPositions.Length; i++)
{
float intensity = 2;
Color lightColor = Color.LightYellow;
Color lightSpecularColour = Color.WhiteSmoke;
//interface to the light about to be created
IMaterialPointLight light = null;
//create the point light
light = lights.CreatePointLight(lightPositions[i], intensity, lightColor, lightSpecularColour);
//Adjusting this value controls how quickly the light falloff occurs.
//A larger value will produce a slower falloff, and result in a softer, brighter light.
//A smaller value will produce a darker, but sharper light source.
//Generally, if you reduce this value, increase the intensity to compensate.
light.SourceRadius = 4;
//create the light geometry (a sphere)
if (lightGeometry == null)
lightGeometry = new Xen.Ex.Geometry.Sphere(Vector3.One, 8, true, false, false);
//visually show the light with a light drawer
var lightSourceDrawer = new LightSourceDrawer(lightPositions[i], lightGeometry,lightColor);
//add the light geometry to the screen
drawToScreen.Add(lightSourceDrawer);
}
//create the ground disk
var ground = new GroundDisk(this.Content, lights, diskRadius);
//then add it to the screen
drawToScreen.Add(ground);
}
