From 5f03aec6bc21f6d9cb3e0daa4622d093d7e22ac6 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 12 Nov 2020 18:35:16 +0000
Subject: [PATCH] Added support for vertex colours

---
 examples/osgmultiviewOVR/multiviewOVR.frag | 4 +++-
 examples/osgmultiviewOVR/multiviewOVR.vert | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/examples/osgmultiviewOVR/multiviewOVR.frag b/examples/osgmultiviewOVR/multiviewOVR.frag
index 19b4e006d..7f4d05d18 100644
--- a/examples/osgmultiviewOVR/multiviewOVR.frag
+++ b/examples/osgmultiviewOVR/multiviewOVR.frag
@@ -2,11 +2,13 @@
 
 uniform sampler2D texture;
 
+in vec4 color;
 in vec2 texcoord;
 
 out vec4 fragColor;
 
 void main(void)
 {
-    fragColor = texture2D( texture, texcoord.xy);
+    fragColor = color * texture2D( texture, texcoord.xy);
+    if (fragColor.a==0.0) discard;
 }
diff --git a/examples/osgmultiviewOVR/multiviewOVR.vert b/examples/osgmultiviewOVR/multiviewOVR.vert
index bca31aeb4..79e8164dd 100644
--- a/examples/osgmultiviewOVR/multiviewOVR.vert
+++ b/examples/osgmultiviewOVR/multiviewOVR.vert
@@ -12,14 +12,17 @@ uniform mat4 ovr_projectionMatrix[NUM_VIEWS];
 uniform mat4 ovr_viewMatrix[NUM_VIEWS];
 
 in vec4 osg_Vertex;
+in vec4 osg_Color;
 in vec4 osg_MultiTexCoord0;
 
+out vec4 color;
 out vec2 texcoord;
 
 void main(void)
 {
     mat4 mvp = ovr_projectionMatrix[gl_ViewID_OVR] * osg_ProjectionMatrix * ovr_viewMatrix[gl_ViewID_OVR] * osg_ModelViewMatrix;
 
+    color = osg_Color;
     texcoord = osg_MultiTexCoord0.xy;
 
     gl_Position = mvp * osg_Vertex;