private LitShaderDescription setupEntityLight(Entity entity, Matrix4 modelViewMatrix, bool skin)
{
// Calculate lighting
if(entity.Self?.Room == null)
{
var shader = ShaderManager.GetEntityShader(0, skin);
GL.UseProgram(shader.Program);
return shader;
}
var room = entity.Self.Room;
var ambientComponent = new[]
{
room.AmbientLighting[0],
room.AmbientLighting[1],
room.AmbientLighting[2],
1.0f
};
if(room.Flags.HasFlagUns(RoomFlag.Water))
{
EngineWorld.CalculateWaterTint(ambientComponent, false);
}
var currentLightNumber = 0;
var positions = new float[MAX_NUM_LIGHTS * 3];
var colors = new float[MAX_NUM_LIGHTS * 4];
var innerRadiuses = new float[MAX_NUM_LIGHTS * 1];
var outerRadiuses = new float[MAX_NUM_LIGHTS * 1];
for (var i = 0; i < room.Lights.Count && currentLightNumber < MAX_NUM_LIGHTS; i++)
{
var currentLight = room.Lights[i];
var xyz = entity.Transform.Origin - currentLight.Position;
var distance = xyz.Length;
// Find color
for (var j = 0; j < 4; j++)
colors[currentLightNumber * 4 + i] = Math.Min(Math.Max(currentLight.Colour[i], 0.0f), 1.0f);
if (room.Flags.HasFlagUns(RoomFlag.Water))
{
unsafe
{
fixed (float* ptr = colors)
EngineWorld.CalculateWaterTint(&ptr[currentLightNumber * 4],
false);
}
}
// Find position
var tmpPos = modelViewMatrix.MultiplyByQuaternion(currentLight.Position.ToQuat());
Array.Copy(tmpPos.ToArray(), 0, positions, currentLightNumber * 3, 3);
// Find fall-off
if(currentLight.LightType == LightType.Sun)
{
innerRadiuses[currentLightNumber] = 1e20f;
outerRadiuses[currentLightNumber] = 1e21f;
currentLightNumber++;
}
else if (distance <= currentLight.Outer + 1024.0f &&
(currentLight.LightType == LightType.Point || currentLight.LightType == LightType.Shadow))
{
innerRadiuses[currentLightNumber] = Math.Abs(currentLight.Inner);
outerRadiuses[currentLightNumber] = Math.Abs(currentLight.Outer);
currentLightNumber++;
}
}
{
var shader = ShaderManager.GetEntityShader(currentLightNumber, skin);
GL.UseProgram(shader.Program);
GL.Uniform4(shader.LightAmbient, 1, ambientComponent);
GL.Uniform4(shader.LightPosition, currentLightNumber, colors);
GL.Uniform3(shader.LightPosition, currentLightNumber, positions);
GL.Uniform1(shader.LightInnerRadius, currentLightNumber, innerRadiuses);
GL.Uniform1(shader.LightOuterRadius, currentLightNumber, outerRadiuses);
return shader;
}
}