archive/blender-archive
Archived
1
1
Fork 0
Code Pull Requests Packages Activity

Shading: Add a clamp option to the Map Range node.

Browse Source 
If the option is enabled, the output is clamped to the target range.
The target range is [To Min, To Max]. The option is enabled by default.

The clamp option is implemented in EEVEE by linking to the `clamp_value`
GLSL function. And it is implemented in Cycles using a graph expand
function.

Reviewers: brecht, JacquesLucke

Differential Revision: https://developer.blender.org/D5477
This commit is contained in:
OmarSquircleArt
2019-08-14 10:53:19 +02:00
parent c9acc5faad
commit 7a7eadaf7f
7 changed files with 52 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
intern/cycles/render/nodes.cpp
View File

@@ -5280,6 +5280,21 @@ MapRangeNode::MapRangeNode() : ShaderNode(node_type)
{
}
void MapRangeNode::expand(ShaderGraph *graph)
{
if (clamp) {
ShaderOutput *result_out = output("Result");
if (!result_out->links.empty()) {
ClampNode *clamp_node = new ClampNode();
clamp_node->min = to_min;
clamp_node->max = to_max;
graph->add(clamp_node);
graph->relink(result_out, clamp_node->output("Result"));
graph->connect(result_out, clamp_node->input("Value"));
}
}
}
void MapRangeNode::constant_fold(const ConstantFolder &folder)
{
if (folder.all_inputs_constant()) {