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How to Enable Lighting on T2DShape3D

by Alex Richards · in Torque X 2D · 08/28/2009 (7:00 am) · 5 replies

if you have source code access you can get lighting, for 3DShapes, by modifying the SetMaterial method in TorqueCoreTStsRender.cs

Change

SimpleMaterial effect = new SimpleMaterial();

to this and add

LightingMaterial effect = new LightingMaterial();  
effect.LightingMode = LightingMode.PerPixel;

also normal maps can be enabled by adding

String normalName = Shape.CurrentFilePath + @"" + material.Name + "normal";
     if (File.Exists(normalName + ".xnb"))
     {
          effect.NormalMapFilename = normalName;
          material._renderMaterial = MaterialManager.Add(normalName, effect);
     }

but the normal map file name has to be the same as the diffuse map name, but with "normal" added to the end of the file name.

also under TorqueCoreMaterialsLightingMaterial comment out
the for (; i < MaxSupportedLights; i++) loop in the _SetupObjectParameters method.

*EDIT*
also change in the private, protected, internal fields section of LightingMaterial.cs from
Vector3[] _positions;
        Vector3[] _colors;
        Vector3[] _ambients;
        Vector2[] _attenuations;

to

Vector3[] _positions = new Vector3[_globalMaxLightCount];
        Vector3[] _colors = new Vector3[_globalMaxLightCount];
        Vector3[] _ambients = new Vector3[_globalMaxLightCount];
        Vector2[] _attenuations = new Vector2[_globalMaxLightCount];

Otherwise you'll get an array out of bounds error, if the amount of lights is not equal to MaxSupportedLights.

Then all you need to do is add a light through code or in the builder

*EDIT*
added normal map stuff...
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Torque Owner David Horn
#1
08/29/2009 (2:21 pm)
Oh, man this could be unbelievably awesome in my game!!

I followed your instructions, however, I'm a little confused about the adding a light part. I added a torque object with a light component, but all of my T2DShape3D objects are completely black.

Is it because I'm using a 2D light? If so, could you possibly show me how to add the light? I have the pro versions of both TX2D and TX3D.

EDIT:
I tried it myself but no luck.

I imported the Torque3D into my solution and wrote the folloring code I got from another post:
//create light
            TorqueObject obj = new TorqueObject();
            obj.Name = "Sun";

            T3DSceneComponent scene = new T3DSceneComponent();
            scene.SceneGroup = "Sun";
            scene.Position = new Vector3(1050, 1050, 400);
            obj.Components.AddComponent(scene);

            DirectionalLight sun = new DirectionalLight();
            sun.ConstantAttenuation = 1.0f;
            sun.LinearAttenuation = 0.0f;
            sun.AmbientColor = new Vector3(0.7f, 0.4f, 0.4f);
            sun.DiffuseColor = new Vector3(0.75f, 0.75f, 0.75f);
            sun.Direction = Vector3.Down;

            T3DLightComponent light = new T3DLightComponent();
            light.SceneGroupName = obj.Name;
            light.IsEnabled = true;
            light.LightList.Add(sun);
            obj.Components.AddComponent(light);

            TorqueObjectDatabase.Instance.Register(obj);

But my objects are still black.

Torque Owner Alex Richards
#2
08/29/2009 (6:21 pm)
I just added a blank sceneObject in TorqueX builder and gave it a T2DLightComponent with settings of
0.5 constant attenuation
0.0 linear attenuation
0.0 xyz offset
0.1 for xyz ambient
0.9 for xyz diffuse

and positioned it where i wanted

or to add through code
public void createLight()
        {
            //create light
            T2DSceneObject obj = new T2DSceneObject();
            obj.Name = "Sun";
            obj.Position = new Vector2(-200f, 0f);

            DirectionalLight sun = new DirectionalLight();
            sun.ConstantAttenuation = 1.0f;
            sun.LinearAttenuation = 0.0f;
            sun.AmbientColor = new Vector3(0.7f, 0.4f, 0.4f);
            sun.DiffuseColor = new Vector3(0.75f, 0.75f, 0.75f);
            sun.Direction = Vector3.Up;

            T2DLightComponent light = new T2DLightComponent();
            light.IsEnabled = true;
            light.LightList.Add(sun);
            obj.Components.AddComponent(light);

            TorqueObjectDatabase.Instance.Register(obj);
        }

Associate John Kanalakis
EnvyGames
#3
08/29/2009 (8:11 pm)
Looks great, Alex. Added to the Torque X 3.1.4 release

John K.
www.envygames.com

Torque Owner David Horn
#4
08/29/2009 (8:36 pm)
I'm getting a nullReferenceException on this line:

_positions[i] = lights[i].Position;

It's in the for loop right above the one that you said to comment out.

EDIT:
I added the following above the for loop
_positions = new Vector3[8];
_colors = new Vector3[8];
_ambients = new Vector3[8];
_attenuations = new Vector2[8];

now it seems to work

actually, let me rephrase that...

WOOOHOOOOO!!! IT WORKS!!!

Torque Owner Alex Richards
#5
08/29/2009 (9:36 pm)
Glad it works, yeah sorry about that nullReferenceException. I forgot to add the change I made to the light variables, edited original post to reflect that.