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struct Test_MeshFromStrandsModifier
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(
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-- Tests that a distribution map can be assigned to control which proxy mesh is used for which strand in Mesh From Strands modifier
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function Test_ProxyDistributionMap =
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(
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-- Create a plane with 3x3 segments (so that there are are no vertices going exactly down the middle)
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distributionObject = Plane lengthsegs:3 widthsegs:3
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-- Create a simple box and another plane, we'll use these as proxy meshes
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boxProxy = Box lengthsegs:1 widthsegs:1 heightsegs:1
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planeProxy = Plane lengthsegs:1 widthsegs:1
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max modify mode
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-- Add guides from surface modifier and make sure we'll use vertices to generate strands, so that we always have a predictable strand count
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select distributionObject
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modPanel.addModToSelection (Ox_Guides_from_Surface())
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distributionObject.modifiers[#Ox_Guides_from_Surface].method = 4
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-- Add "Ox Mesh From Strands" modifier
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modPanel.addModToSelection (Ox_Mesh_from_Strands())
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$.modifiers[#Ox_Mesh_from_Strands].type = 2
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-- Add the two proxy objects
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$.modifiers[#Ox_Mesh_from_Strands].addproxyobject boxProxy
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$.modifiers[#Ox_Mesh_from_Strands].addproxyobject planeProxy
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-- Assign a new checkers texture to the proxy map slot
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$.modifiers[#Ox_Mesh_From_Strands].proxyDistributionMap = Checker ()
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-- TODO: Add some assertions
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-- Cleanup
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delete distributionObject
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delete boxProxy
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delete planeProxy
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),
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-- When Edit Normals modifier is applied to a proxy object and normals are edited, the custom normals should also appear in the resulting hair mesh
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function Test_ProxyCustomNormalsAreCopied =
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(
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distributionObject = Plane()
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distributionObject.width = 50
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distributionObject.length = 50
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proxyPlane = Plane lengthsegs:1 widthsegs:1
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proxyPlane.width = 50
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proxyPlane.length = 50
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max modify mode
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-- Edit the proxy plane normals to all point up
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select proxyPlane
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modPanel.addModToSelection (Edit_Normals())
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editNormalsModifier = $.modifiers[1]
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editNormalsModifier.Select #{1..4}
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editNormalsModifier.Move [100, 100, 0]
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-- Set up the mesh from strands modifier
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-- Add guides from surface modifier and make sure we'll use vertices to generate strands, so that we always have a predictable strand count
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select distributionObject
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guidesFromSurfaceModifier = Ox_Guides_from_Surface()
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TestUtilities.SetGuidesFromMeshDefaults guidesFromSurfaceModifier
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guidesFromSurfaceModifier.count = 1
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modPanel.addModToSelection guidesFromSurfaceModifier
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-- Add "Ox Mesh From Strands" modifier
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meshFromStrandsModifierInstance = Ox_Mesh_from_Strands()
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meshFromStrandsModifierInstance.type = 2
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meshFromStrandsModifierInstance.addproxyobject proxyPlane
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meshFromStrandsModifierInstance.uniScale = off
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modPanel.addModToSelection meshFromStrandsModifierInstance
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-- Make sure the normals in the resulting mesh are the same as the normals in the proxy mesh
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modPanel.addModToSelection (Edit_Normals())
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resultEditNormalsModifier = $.modifiers[#Edit_Normals]
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firstNormal = resultEditNormalsModifier.getnormal 1
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-- The resulting vector should not point directly up, down, etc.
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EAssert.AreNotNearEqual 0.0 firstNormal.x
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EAssert.AreNotNearEqual 1.0 firstNormal.x
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EAssert.AreNotNearEqual 0.0 firstNormal.y
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EAssert.AreNotNearEqual 1.0 firstNormal.y
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EAssert.AreNotNearEqual 0.0 firstNormal.z
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EAssert.AreNotNearEqual 1.0 firstNormal.z
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-- Cleanup
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delete distributionObject
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delete proxyPlane
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),
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function Test_TwistChannel =
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(
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distributionObject = Plane lengthsegs:1 widthsegs:1
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max modify mode
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-- Set up the mesh from strands modifier, use per vertex distribution
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select distributionObject
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-- Guides from surface modifier with vertex distribution and 2 points per strand
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guidesFromSurfaceModifier = Ox_Guides_from_Surface()
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modPanel.addModToSelection guidesFromSurfaceModifier
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guidesFromSurfaceModifier.method = 4
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guidesFromSurfaceModifier.NumSegs = 2
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editGuidesModifier = Ox_Edit_Guides()
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modPanel.addModToSelection editGuidesModifier
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-- Create a twist channel
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twistChannelIndex = editGuidesModifier.CreateChannel true "TwistChannel"
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editGuidesModifier.SelectRoots #{1..4}
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-- Add mesh from strands modifier with bollboard setting and apply the twist channel to twist
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meshFromStrandsModifier = Ox_Mesh_from_Strands()
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modPanel.addModToSelection meshFromStrandsModifier
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meshFromStrandsModifier.type = 1
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meshFromStrandsModifier.twistChan = ( TestUtilities.GetRootChannelIdentifier twistChannelIndex )
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meshFromStrandsModifier.twistDir = 1
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-- Copy resulting mesh vertices before the twist
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verticesBeforeTwist = TestUtilities.GetVertexArray distributionObject.mesh
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modPanel.setCurrentObject editGuidesModifier
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subobjectLevel = 1
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editGuidesModifier.SetChannelValueToSelection true twistChannelIndex 0.2
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modPanel.setCurrentObject meshFromStrandsModifier
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verticesAfterTwist = TestUtilities.GetVertexArray distributionObject.mesh
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-- Make sure that, after we applied the twist channel value, the vertex positions have changed
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for i = 1 to verticesBeforeTwist.count do
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(
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EAssert.AreNotNearEqual verticesBeforeTwist[i].x verticesAfterTwist[i].x
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EAssert.AreNotNearEqual verticesBeforeTwist[i].y verticesAfterTwist[i].y
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-- The Z coordinate will remain the same since twist is only along one axis
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)
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-- Cleanup
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delete distributionObject
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),
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function Test_RenderSettingsWidthControlsProxyUniformWidth =
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(
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distributionObject = Plane lengthsegs:1 widthsegs:1
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max modify mode
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-- Set up the mesh from strands modifier, use per vertex distribution
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select distributionObject
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-- Guides from surface modifier with vertex distribution and 2 points per strand, no randomness in length, and strand length of 1
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guidesFromSurfaceModifier = Ox_Guides_from_Surface()
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modPanel.addModToSelection guidesFromSurfaceModifier
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guidesFromSurfaceModifier.method = 4
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guidesFromSurfaceModifier.NumSegs = 2
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guidesFromSurfaceModifier.randomness = 0
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guidesFromSurfaceModifier.guideLength = 1
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-- Render settings modifier with global radius of 2
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renderSettingsModifier = Ox_Render_Settings()
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modPanel.addModToSelection renderSettingsModifier
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renderSettingsModifier.radius = 2
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-- Mesh from strands modifier with a box proxyobject and uniform scale on
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meshFromStrandsModifier = Ox_Mesh_from_Strands()
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modPanel.addModToSelection meshFromStrandsModifier
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meshFromStrandsModifier.type = 2
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meshFromStrandsModifier.uniScale = on
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boxProxy = Box lengthsegs:1 widthsegs:1 heightsegs:1
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meshFromStrandsModifier.addproxyobject boxProxy
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-- Measure the resulting proxy mesh box by comparing the first and fifth vertex Z coordinate, it should have the size of 2
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EAssert.AreNearEqual 2 ( distance( distributionObject.mesh.vertices[1].position ) ( distributionObject.mesh.vertices[2].position ) )
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-- Change the render settings width to 0.5 and make sure the resulting box sizes change
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renderSettingsModifier.radius = 0.5
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EAssert.AreNearEqual 0.5 ( distance( distributionObject.mesh.vertices[1].position ) ( distributionObject.mesh.vertices[2].position ) )
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-- Cleanup
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delete distributionObject
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delete boxProxy
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)
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)
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EUnit.AddTestClass Test_MeshFromStrandsModifier
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ok
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