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Fix view vector in pbr frag to work in ortho (#2370)
# Objective Fixes #2369 ## Solution Use the view forward direction for all frags when using ortho view.
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1 changed files with 6 additions and 1 deletions
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@ -400,7 +400,12 @@ void main() {
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emissive.rgb *= texture(sampler2D(StandardMaterial_emissive_texture, StandardMaterial_emissive_texture_sampler), v_Uv).rgb;
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# endif
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vec3 V = normalize(CameraPos.xyz - v_WorldPosition.xyz);
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vec3 V;
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if (ViewProj[3][3] != 1.0) { // If the projection is not orthographic
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V = normalize(CameraPos.xyz - v_WorldPosition.xyz); // Only valid for a perpective projection
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} else {
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V = normalize(vec3(-ViewProj[0][2],-ViewProj[1][2],-ViewProj[2][2])); // Ortho view vec
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}
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// Neubelt and Pettineo 2013, "Crafting a Next-gen Material Pipeline for The Order: 1886"
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float NdotV = max(dot(N, V), 1e-4);
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