88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
//
|
|
// Copyright Contributors to the MaterialX Project
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
|
|
#include <MaterialXGenShader/Nodes/HwPositionNode.h>
|
|
|
|
#include <MaterialXGenShader/Shader.h>
|
|
|
|
MATERIALX_NAMESPACE_BEGIN
|
|
|
|
ShaderNodeImplPtr HwPositionNode::create()
|
|
{
|
|
return std::make_shared<HwPositionNode>();
|
|
}
|
|
|
|
void HwPositionNode::createVariables(const ShaderNode& node, GenContext&, Shader& shader) const
|
|
{
|
|
ShaderStage vs = shader.getStage(Stage::VERTEX);
|
|
ShaderStage ps = shader.getStage(Stage::PIXEL);
|
|
|
|
addStageInput(HW::VERTEX_INPUTS, Type::VECTOR3, HW::T_IN_POSITION, vs);
|
|
|
|
const ShaderInput* spaceInput = node.getInput(SPACE);
|
|
const int space = spaceInput ? spaceInput->getValue()->asA<int>() : OBJECT_SPACE;
|
|
if (space == WORLD_SPACE)
|
|
{
|
|
addStageConnector(HW::VERTEX_DATA, Type::VECTOR3, HW::T_POSITION_WORLD, vs, ps);
|
|
}
|
|
else
|
|
{
|
|
addStageConnector(HW::VERTEX_DATA, Type::VECTOR3, HW::T_POSITION_OBJECT, vs, ps);
|
|
}
|
|
}
|
|
|
|
void HwPositionNode::emitFunctionCall(const ShaderNode& node, GenContext& context, ShaderStage& stage) const
|
|
{
|
|
const HwShaderGenerator& shadergen = static_cast<const HwShaderGenerator&>(context.getShaderGenerator());
|
|
|
|
const ShaderInput* spaceInput = node.getInput(SPACE);
|
|
const int space = spaceInput ? spaceInput->getValue()->asA<int>() : OBJECT_SPACE;
|
|
|
|
DEFINE_SHADER_STAGE(stage, Stage::VERTEX)
|
|
{
|
|
VariableBlock& vertexData = stage.getOutputBlock(HW::VERTEX_DATA);
|
|
const string prefix = shadergen.getVertexDataPrefix(vertexData);
|
|
if (space == WORLD_SPACE)
|
|
{
|
|
ShaderPort* position = vertexData[HW::T_POSITION_WORLD];
|
|
if (!position->isEmitted())
|
|
{
|
|
position->setEmitted();
|
|
shadergen.emitLine(prefix + position->getVariable() + " = hPositionWorld.xyz", stage);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ShaderPort* position = vertexData[HW::T_POSITION_OBJECT];
|
|
if (!position->isEmitted())
|
|
{
|
|
position->setEmitted();
|
|
shadergen.emitLine(prefix + position->getVariable() + " = " + HW::T_IN_POSITION, stage);
|
|
}
|
|
}
|
|
}
|
|
|
|
DEFINE_SHADER_STAGE(stage, Stage::PIXEL)
|
|
{
|
|
VariableBlock& vertexData = stage.getInputBlock(HW::VERTEX_DATA);
|
|
const string prefix = shadergen.getVertexDataPrefix(vertexData);
|
|
shadergen.emitLineBegin(stage);
|
|
shadergen.emitOutput(node.getOutput(), true, false, context, stage);
|
|
if (space == WORLD_SPACE)
|
|
{
|
|
const ShaderPort* position = vertexData[HW::T_POSITION_WORLD];
|
|
shadergen.emitString(" = " + prefix + position->getVariable(), stage);
|
|
}
|
|
else
|
|
{
|
|
const ShaderPort* position = vertexData[HW::T_POSITION_OBJECT];
|
|
shadergen.emitString(" = " + prefix + position->getVariable(), stage);
|
|
}
|
|
shadergen.emitLineEnd(stage);
|
|
}
|
|
}
|
|
|
|
MATERIALX_NAMESPACE_END
|