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Add support for Map Range node #45

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Add support for Map Range node #45

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44 changes: 44 additions & 0 deletions export_datasmith.py
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Original file line number Diff line number Diff line change
Expand Up @@ -489,6 +489,8 @@ def exp_mixrgb(node, exp_list):
"MAPPING_NORMAL": "/DatasmithBlenderContent/MaterialFunctions/MappingNormal",
"NORMAL_FROM_HEIGHT": "/Engine/Functions/Engine_MaterialFunctions03/Procedurals/NormalFromHeightmap",
"WORLD_POSITION": "/DatasmithBlenderContent/MaterialFunctions/BlenderWorldPosition",
"MAP_RANGE_LINEAR": "/Engine/Functions/Engine_MaterialFunctions03/Math/RemapValueRange",
"SMOOTHSTEP": "/Engine/Functions/Engine_MaterialFunctions02/SmoothStep",
}


Expand Down Expand Up @@ -904,6 +906,46 @@ def exp_fresnel(node, exp_list):
n.push(Node("0", exp_ior))
return exp_list.push(n)

def exp_map_range(node, exp_list):
if node.interpolation_type == 'LINEAR':
n = Node("FunctionCall", { "Function": op_custom_functions["MAP_RANGE_LINEAR"] })
exp_value = get_expression(node.inputs['Value'], exp_list)
n.push(Node("0", exp_value))
exp_from_min = get_expression(node.inputs['From Min'], exp_list)
n.push(Node("1", exp_from_min))
exp_from_max = get_expression(node.inputs['From Max'], exp_list)
n.push(Node("2", exp_from_max))
exp_to_min = get_expression(node.inputs['To Min'], exp_list)
n.push(Node("3", exp_to_min))
exp_to_max = get_expression(node.inputs['To Max'], exp_list)
n.push(Node("4", exp_to_max))
exp = { "expression": exp_list.push(n) }
if node.clamp:
clamp = Node("Clamp")
clamp.push(Node("0", exp))
clamp.push(Node("1", exp_to_min))
clamp.push(Node("2", exp_to_max))
exp = { "expression": exp_list.push(clamp) }
return exp
elif node.interpolation_type == 'SMOOTHSTEP':
smoothstep = Node("FunctionCall", { "Function": op_custom_functions["SMOOTHSTEP"] })
exp_value = get_expression(node.inputs['Value'], exp_list)
smoothstep.push(Node("0", exp_value))
exp_from_min = get_expression(node.inputs['From Min'], exp_list)
smoothstep.push(Node("1", exp_from_min))
exp_from_max = get_expression(node.inputs['From Max'], exp_list)
smoothstep.push(Node("2", exp_from_max))
n = Node("FunctionCall", { "Function": op_custom_functions["MAP_RANGE_LINEAR"] })
n.push(Node("0", { "expression": exp_list.push(smoothstep) }))
n.push(Node("1", {"expression": exp_scalar(0.0, exp_list)}))
n.push(Node("2", {"expression": exp_scalar(1.0, exp_list)}))
exp_to_min = get_expression(node.inputs['To Min'], exp_list)
n.push(Node("3", exp_to_min))
exp_to_max = get_expression(node.inputs['To Max'], exp_list)
n.push(Node("4", exp_to_max))
return { "expression": exp_list.push(n) }

log.error("MAP_RANGE node interpolation type:%s not found" % node.interpolation_type)

context_stack = []
def push_context(context):
Expand Down Expand Up @@ -1338,6 +1380,8 @@ def get_expression_inner(field, exp_list):
return exp_math(node, exp_list)
if node.type == 'VECT_MATH':
return exp_vect_math(node, exp_list)
if node.type == 'MAP_RANGE':
return exp_map_range(node, exp_list)

# if node.type == 'SHADERTORGB':

Expand Down