problem creating lights effectt. split screen and rotate

1

i had problem creating lights effectts, i follow some tutorial and i got one. ok this that i have.

NewSpriteEffectt,fx:

sampler s0;
texture lightMask;
sampler lightSampler= sampler_state { Texture = ;};

Texture2D SpriteTexture;

sampler2D SpriteTextureSampler = sampler_state
{
Texture = ;
};

struct VertexShaderOutput
{
float4 Position : SV_POSITION;
float4 Color : COLOR0;
float2 TextureCoordinates : TEXCOORD0;

};

float4 MainPS(VertexShaderOutput input) : COLOR
{
return tex2D(SpriteTextureSampler,input.TextureCoordinates) * input.Color;
}
float4 MyPixelShader(float2 coords: TEXTCOORD0):COLOR0
{
float4 color = tex2D(s0,coords);
float4 lightColor = tex2D(lightSampler,coords);
return color*lightColor;
//return float4(1,0,0,.5f);

}
technique Technique1
{
pass Pass1
{
PixelShader = compile ps_4_0_level_9_1 MyPixelShader();
//PixelShader = compile ps_2_0 MyPixelShader();
}
};

Game.cs:

namespace Effects01
{

public class Game1 : Game
{
    GraphicsDeviceManager graphics;
    SpriteBatch spriteBatch;
    Texture2D Emblema,lightMask;
    Effect effect;
    RenderTarget2D lightsTarget;
    RenderTarget2D mainTarget;

    Vector2 position;
    public Game1()
    {
        graphics = new GraphicsDeviceManager(this);
        Content.RootDirectory = "Content";
    }

    protected override void Initialize()
    {


        base.Initialize();
    }

    protected override void LoadContent()
    {
        // Create a new SpriteBatch, which can be used to draw textures.
        spriteBatch = new SpriteBatch(GraphicsDevice);
        Emblema = Content.Load<Texture2D>("emblem");
        lightMask = Content.Load<Texture2D>("lightmask");
        effect = Content.Load<Effect>("NewSpriteEffect");

        var pp = GraphicsDevice.PresentationParameters;
        lightsTarget = new RenderTarget2D(GraphicsDevice,pp.BackBufferWidth/4,pp.BackBufferHeight/4);
        mainTarget = new RenderTarget2D(GraphicsDevice, pp.BackBufferWidth, pp.BackBufferHeight);

        position = new Vector2(32,32);
       
    }

 
    protected override void UnloadContent()
    {
       
    }


    protected override void Update(GameTime gameTime)
    {
        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || 
        Keyboard.GetState().IsKeyDown(Keys.Escape))
            Exit();

        // TODO: Add your update logic here
        if (Keyboard.GetState().IsKeyDown(Keys.Right)) { position.X += 4; }
        if (Keyboard.GetState().IsKeyDown(Keys.Left)) { position.X -= 4; }
        if (Keyboard.GetState().IsKeyDown(Keys.Up)) { position.Y -= 4; }
        if (Keyboard.GetState().IsKeyDown(Keys.Down)) { position.Y += 4; }


        base.Update(gameTime);
    }

    protected override void Draw(GameTime gameTime)
    {
        GraphicsDevice.SetRenderTarget(lightsTarget);
        GraphicsDevice.Clear(Color.Black);
        spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.Additive);
        //effect.CurrentTechnique.Passes[0].Apply();
        spriteBatch.Draw(lightMask,position,Color.White);
        spriteBatch.End();

        

        GraphicsDevice.SetRenderTarget(mainTarget);
        GraphicsDevice.Clear(Color.CornflowerBlue);

        
        spriteBatch.Begin();
        spriteBatch.Draw(Emblema, new Vector2(400 - Emblema.Width / 2, 240 - Emblema.Height / 2), Color.White);
        spriteBatch.End();

        GraphicsDevice.SetRenderTarget(null);
        GraphicsDevice.Clear(Color.CornflowerBlue);
        spriteBatch.Begin(SpriteSortMode.Immediate,BlendState.AlphaBlend);
        effect.Parameters["lightMask"].SetValue(lightsTarget);
        effect.CurrentTechnique.Passes[0].Apply();
        spriteBatch.Draw(mainTarget,Vector2.Zero,Color.White);
        spriteBatch.End();




        base.Draw(gameTime);
    }
}

}

the program divide the screen in 4 parts what is wron and there is somethin like mirror effectt. if i wan to go up the light go to down… and the sprites like emblema is rotate 180 degree…
thank for your help…

problem2.png1366×768 153 KB
problem1.png1366×768 154 KB

2

What are you trying to achieve ? What’s the purpose of the 4 screens ?

3

well i only want to a simple light to move around the world, but instead i got 4 screen and mirrored sprites.

4

in the post there is a mistake with Texture = ;
sampler s0;
texture lightMask;
sampler lightSampler= sampler_state { Texture = ;};

Texture2D SpriteTexture;

sampler2D SpriteTextureSampler = sampler_state
{
Texture = ;
};

struct VertexShaderOutput
{
float4 Position : SV_POSITION;
float4 Color : COLOR0;
float2 TextureCoordinates : TEXCOORD0;

};

float4 MainPS(VertexShaderOutput input) : COLOR
{
return tex2D(SpriteTextureSampler,input.TextureCoordinates) * input.Color;
}
float4 MyPixelShader(float2 coords: TEXTCOORD0):COLOR0
{
float4 color = tex2D(s0,coords);
float4 lightColor = tex2D(lightSampler,coords);
return color*lightColor;
//return float4(1,0,0,.5f);

}
technique Technique1
{
pass Pass1
{
PixelShader = compile ps_4_0_level_9_1 MyPixelShader();
//PixelShader = compile ps_2_0 MyPixelShader();
}
};

5

You can nicely format the code and get syntax highlighting by wrapping it in triple backticks. That will fix the brackets too

6

Have you tried adding addressU addressV in the samplerstates’ declarations and their value as CLAMP?
This should avoid the texture repeat to begin with

7

thank to all, i have solve my problem. in a next post i will show the complete program to help another people.

8

Glad you solved it. :slight_smile:
What was the problem then?