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Solved reconstruct depth in orthographic view


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#1 jeremie009   Members   -  Reputation: 255

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Posted 27 September 2012 - 12:30 AM

I've been trying to get my world space position of my pixel but I'm missing something.
I'm using a orthographic view for a 2.5d game. My depth is linear and this is my code.

// Pixel shader
	 float3 lightPos  = lightPosition;// light World position use to draw the sphere volume
	 float2 texCoord = PostProjToScreen(PSIn.lightPosition)+halfPixel;// use to project the normal and depth texture.
  
	 float depth = tex2D(depthMap, texCoord);
  
	 float4 position;
  
	 position.x = texCoord.x *2-1;
	 position.y = (1-texCoord.y)*2-1;
	 position.z = depth.r;
	 position.w = 1;
	 position = mul(position, inViewProjection);
	 //position.xyz/=position.w; // I comment it but even without it it doesn't work
  
  
	 float4 normal = (tex2D(normalMap, texCoord)-.5f) * 2;
	 normal = normalize(normal);
  
	 float3 lightDirection = normalize(lightPos-position);
	 float att = saturate(1.0f - length(lightDirection) /attenuation);
	 float lightning = saturate (dot(normal, lightDirection));

	 return float4(lightColor* lightning*att, 1);



I'm using a sphere but it's not working the way I want. I reproject the textures properly onto the sphere but the light coordinates in the pixel shader seems to be stuck at zero even if when I move the camera light volume update accordingly. I'm using an orthographic view ( non off centered) and xna.

Edited by jeremie009, 27 September 2012 - 08:35 AM.


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#2 jeremie009   Members   -  Reputation: 255

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Posted 27 September 2012 - 08:35 AM

I fixed my problem. My light transformation was quite off and the formula to reproject was cool. So no problem then.




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