iModelMatrix undeclared in hlsl code

error X3004: undeclared identifier 'iModelMatrix'
Isn’t it supposed to be a global variable?

Did you include the necessary headers and set the necessary defines? (Not sure if both of those are a possible problem for your specific issue, but it seems likely to be that one of them is there cause)

iModelMatrix is defined in Transform.hlsl/glsl and it can only be accessed in the vertex shader because of COMPILEVS.

Turns out putting the actual code at the top of the file and removing the comments solved it? Pretty weird but at least it’s working now

Now it’s complaining about iNormal.

Without actual shader code there’s nothing we can do.

Problem is in VS(), the GetWorldNormal

#include "Transform.hlsl"

uniform float cOutlineWidth = 0.01;

uniform float4 cOutlineColor = float4(1.0, 1.0, 1.0, 1.0);

void VS(float4 iPos : POSITION,
	out float2 oTexCoord : TEXCOORD0,
	out float2 oScreenPos : TEXCOORD1,
	out float4 oPos : OUTPOSITION)
	float4x3 modelMatrix = iModelMatrix;
	float3 worldPos = GetWorldPos(modelMatrix);
	float3 vNormal = GetWorldNormal(modelMatrix);
// Scale along normal
	worldPos += vNormal * cOutlineWidth;
	//gl_Position = GetClipPos(worldPos);
    oPos = GetClipPos(worldPos);


void PS(float2 iTexCoord : TEXCOORD0,
	float2 iScreenPos : TEXCOORD1,
	out float4 oColor : SV_Target)
	oColor = cOutlineColor.rgba;

Well. You don’t pass the normal into shader. So the compiler cannot find it.
You can see how standard shaders pass normal and do the same.

Although I admit that design of shader API in Urho is meh.

Thanks a lot for the info! I admit the solution was very simple, but it would’ve been helpful if it was mentioned in the docs.