From f04ddf031de8849c070110d4b15b78c89e519e27 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Sat, 9 Jan 2021 19:44:46 +0100
Subject: [PATCH] extra surf prop for opengl

---
 src/gl/gl3device.cpp | 8 +++++---
 src/gl/rwgl3.h       | 2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/gl/gl3device.cpp b/src/gl/gl3device.cpp
index 4474d71..4ed7977 100644
--- a/src/gl/gl3device.cpp
+++ b/src/gl/gl3device.cpp
@@ -111,6 +111,7 @@ struct GLShaderState
 {
 	RGBA matColor;
 	SurfaceProperties surfProps;
+	float extraSurfProp;
 };
 
 const char *shaderDecl120 =
@@ -1103,7 +1104,7 @@ Shader *lastShaderUploaded;
 #define U(i) currentShader->uniformLocations[i]
 
 void
-setMaterial(const RGBA &color, const SurfaceProperties &surfaceprops)
+setMaterial(const RGBA &color, const SurfaceProperties &surfaceprops, float extraSurfProp)
 {
 	bool force = lastShaderUploaded != currentShader;
 	if(force || !equal(shaderState.matColor, color)){
@@ -1116,12 +1117,13 @@ setMaterial(const RGBA &color, const SurfaceProperties &surfaceprops)
 	if(force ||
 	   shaderState.surfProps.ambient != surfaceprops.ambient ||
 	   shaderState.surfProps.specular != surfaceprops.specular ||
-	   shaderState.surfProps.diffuse != surfaceprops.diffuse){
+	   shaderState.surfProps.diffuse != surfaceprops.diffuse ||
+	   shaderState.extraSurfProp != extraSurfProp){
 		float surfProps[4];
 		surfProps[0] = surfaceprops.ambient;
 		surfProps[1] = surfaceprops.specular;
 		surfProps[2] = surfaceprops.diffuse;
-		surfProps[3] = 0.0f;
+		surfProps[3] = extraSurfProp;
 		glUniform4fv(U(u_surfProps), 1, surfProps);
 		shaderState.surfProps = surfaceprops;
 	}
diff --git a/src/gl/rwgl3.h b/src/gl/rwgl3.h
index 633c792..b14b28c 100644
--- a/src/gl/rwgl3.h
+++ b/src/gl/rwgl3.h
@@ -180,7 +180,7 @@ int32 setLights(WorldLights *lightData);
 
 // per Mesh
 void setTexture(int32 n, Texture *tex);
-void setMaterial(const RGBA &color, const SurfaceProperties &surfaceprops);
+void setMaterial(const RGBA &color, const SurfaceProperties &surfaceprops, float extraSurfProp = 0.0f);
 
 void setAlphaBlend(bool32 enable);
 bool32 getAlphaBlend(void);