TSL: transformDirection operation is incorrect

[njarraud]

Description

When using the transformDirection operation I believe the inner operation is incorrect.

The generated wgsl code is -

normalize( ( direction * matrix ).xyz )

When it shall be -

normalize( ( matrix * direction ).xyz )

Function signature -

transformDirection( direction : Node.<(vec2|vec3|vec4)>, matrix : Node.<(mat2|mat3|mat4)> ) : Node

Reproduction steps

1. Create a node material
2. Use transformDirection node
3. Display generated wgsl

Code

if ( method === MathNode.TRANSFORM_DIRECTION ) {

	// dir can be either a direction vector or a normal vector
	// upper-left 3x3 of matrix is assumed to be orthogonal

	let tA = aNode;
	let tB = bNode;

	if ( builder.isMatrix( tA.getNodeType( builder ) ) ) {

		tB = vec4( vec3( tB ), 0.0 );

	} else {

		tA = vec4( vec3( tA ), 0.0 );

	}

	const mulNode = mul( tA, tB ).xyz; // shall be const mulNode = mul( tB, tA ).xyz;

	outputNode = normalize( mulNode );

}

Live example

Self explanatory

Screenshots

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Version

r183

Device

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Browser

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OS

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