Fix BaseMaterial3D UV1 Offset/Scale being ignored when baking VoxelGI

UV1 Triplanar and Emission on UV2 properties are still ignored,
but implementing them is much more involved.

Author: Calinou

scene/3d/voxelizer.cpp

@@ -152,8 +152,8 @@ void Voxelizer::_plot_face(int p_idx, int p_level, int p_x, int p_y, int p_z, co
 					lnormal = normal;
 				}
 
-				int uv_x = CLAMP(int(Math::fposmod(uv.x, (real_t)1.0) * bake_texture_size), 0, bake_texture_size - 1);
-				int uv_y = CLAMP(int(Math::fposmod(uv.y, (real_t)1.0) * bake_texture_size), 0, bake_texture_size - 1);
+				int uv_x = CLAMP(int(Math::fposmod(uv.x * p_material.uv1_scale.x + p_material.uv1_offset.x, (real_t)1.0) * bake_texture_size), 0, bake_texture_size - 1);
+				int uv_y = CLAMP(int(Math::fposmod(uv.y * p_material.uv1_scale.y + p_material.uv1_offset.y, (real_t)1.0) * bake_texture_size), 0, bake_texture_size - 1);
 
 				int ofs = uv_y * bake_texture_size + uv_x;
 				albedo_accum.r += p_material.albedo[ofs].r;
@@ -184,8 +184,8 @@ void Voxelizer::_plot_face(int p_idx, int p_level, int p_x, int p_y, int p_z, co
 				lnormal = normal;
 			}
 
-			int uv_x = CLAMP(Math::fposmod(uv.x, (real_t)1.0) * bake_texture_size, 0, bake_texture_size - 1);
-			int uv_y = CLAMP(Math::fposmod(uv.y, (real_t)1.0) * bake_texture_size, 0, bake_texture_size - 1);
+			int uv_x = CLAMP(Math::fposmod(uv.x * p_material.uv1_scale.x + p_material.uv1_offset.x, (real_t)1.0) * bake_texture_size, 0, bake_texture_size - 1);
+			int uv_y = CLAMP(Math::fposmod(uv.y * p_material.uv1_scale.y + p_material.uv1_offset.y, (real_t)1.0) * bake_texture_size, 0, bake_texture_size - 1);
 
 			int ofs = uv_y * bake_texture_size + uv_x;
 
@@ -377,11 +377,15 @@ Voxelizer::MaterialCache Voxelizer::_get_material_cache(Ref<Material> p_material
 			mc.emission = _get_bake_texture(empty, Color(0, 0, 0), Color(0, 0, 0));
 		}
 
+		mc.uv1_scale = mat->get_uv1_scale();
+		mc.uv1_offset = mat->get_uv1_offset();
 	} else {
 		Ref<Image> empty;
 
 		mc.albedo = _get_bake_texture(empty, Color(0, 0, 0), Color(1, 1, 1));
 		mc.emission = _get_bake_texture(empty, Color(0, 0, 0), Color(0, 0, 0));
+		mc.uv1_scale = Vector3(1, 1, 1);
+		mc.uv1_offset = Vector3(0, 0, 0);
 	}
 
 	material_cache[p_material] = mc;

scene/3d/voxelizer.h

@@ -91,6 +91,9 @@ class Voxelizer {
 		//128x128 textures
 		Vector<Color> albedo;
 		Vector<Color> emission;
+
+		Vector3 uv1_scale;
+		Vector3 uv1_offset;
 	};
 
 	HashMap<Ref<Material>, MaterialCache> material_cache;