How to read a particular pixel (Texel?) from a texture?

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For example, I’ve this texture named _MyTex, how do I read a particular color(pixel)?

Sorry, Im kinda used to this img.GetPixel() thingy :confused: need proper clarifications of concepts.

TIA.

Could you expand that clarification part a bit? GetPixel just returns an instance of a Pixel class, having r,g,b,a + a few other properties, nothing fancy there...

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I'm so sorry, I'm talking about that GetPixel() in java/swing.. I even forgot what did it really return :/ clarification means.. well, something like a normal java GetPixel() to shader equivalent etc.

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2 Answers

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Assuming you are talking about Shaders (as suggested by the Shader tag and the underscore in front of the variable name), you can use the tex2D function. It takes a sampler2D as its first argument, and a float2 with uv coordinates as its second parameter. The uv coordinates range from 0 to 1.

half4 c=tex2D(_MyTex,float2(0.5,0.5));//Get the pixel at the middle of a texture.

That answered that thing ;) thanks

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I’m not sure what concepts you need clarifying about GetPixel() - it pretty much does what it says on the tin…

public var texture : Texture2D;

function Start () {

	var c = texture.GetPixel(100,100);
	Debug.Log("The pixel at 100,100 has RGB (" + c.r + "," + c.g + "," + c.b +")");

}

Thanks for the support, but I was talking about shaders. So, the above answer seems to be my answer :)

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