Missing right footstep in Wicked Shooter and Character controller scene

[Anthony-Gaudino]

In both Wicked Shooter and Character controller scene the right foot footstep is not shown, this happens because of an incorrect UV mirror.

The current code is material.SetTexMulAdd(Vector(-1, 1, 0, 0)) while it should be material.SetTexMulAdd(Vector(-1, 1, 1, 0)).

Also, the code could be simplified, since both left and right footsteps code are almost the same, I currently have this code here for Wicked Shooter:

function self:Update_Footprints()
    if not enable_footprints then
        return
    end

    local radius = 0.1

    -- this is used to only intersect 1 foot per frame
    self.footprint_index = (self.footprint_index + 1) % 2

    -- Create decal + footstep sound at a nav-mesh contact point
    local function PlaceFootDecal(collEntity, collPos, flip)
        local entity         = CreateEntity()
        local transform      = scene.Component_CreateTransform(entity)
        local material       = scene.Component_CreateMaterial(entity)
        local decal          = scene.Component_CreateDecal(entity)
        local layer          = scene.Component_CreateLayer(entity)
        local soundcomponent = scene.Component_CreateSound(entity)

        transform.MatrixTransform(
            matrix.LookTo(Vector(), self:GetFacing()):Inverse()
        )
        transform.Rotate(Vector(math.pi * 0.5))
        transform.Scale(0.16)
        transform.Translate(collPos)

        material.SetTexture(TextureSlot.BASECOLORMAP, footprint_alpha)
        material.SetTexture(TextureSlot.NORMALMAP,    footprint_normal)
        material.NormalMapStrength = 4

        if flip then
            -- Mirror for right foot
            material.SetTexMulAdd(Vector(-1, 1, 1, 0))
        end

        decal.SetBaseColorOnlyAlpha(true)
        decal.SetSlopeBlendPower(2)

        layer.SetLayerMask(~(soldier_layer | projectile_layer))

        scene.Component_Attach(entity, collEntity)
        table.insert(temp_decal_array, entity)

        soundcomponent.SetSound(sounds)
        soundcomponent.SetSoundInstance(SoundInstance(sounds, 0, 0.33))
        soundcomponent.SetLooped(false)
        soundcomponent.Play()
    end

    -- Test one foot capsule against the nav mesh and stamp if newly placed
    local function CheckFoot(foot, toes, placed_field, flip)
        local capsule = Capsule(
            scene.Component_GetTransform(foot).GetPosition(),
            scene.Component_GetTransform(toes).GetPosition(),
            radius
        )
        local collEntity, collPos = scene.Intersects(
            capsule, FILTER_NAVIGATION_MESH
        )

        if collEntity ~= INVALID_ENTITY then
            if not self[placed_field] then
                self[placed_field] = true
                PlaceFootDecal(collEntity, collPos, flip)
            end
        else
            self[placed_field] = false
        end
    end

    if self.footprint_index == 0 then
        CheckFoot(
            self.left_foot,
            self.left_toes,
            "foot_placed_left",
            false
        )
    else
        CheckFoot(
            self.right_foot,
            self.right_toes,
            "foot_placed_right",
            true
        )
    end
end