use glsl 120

Signed-off-by: Ian Chen <ichen@osrfoundation.org>

media/materials/programs/spotlight_shadow_demo_fp.glsl

@@ -1,12 +1,10 @@
-#version 130
+#version 120
 
 uniform sampler2D shadowMap0;
-in vec4 lightSpacePos0;
+varying vec4 lightSpacePos0;
 
-in vec4 worldPos;
-in vec4 worldViewPos;
-
-out vec4 outputCol;
+varying vec4 worldPos;
+varying vec4 worldViewPos;
 
 //------------------------------------------------------------------------------
 float ShadowSimple(in sampler2D shadowMap, in vec4 shadowMapPos)
@@ -34,11 +32,13 @@ void main()
   float f = 0.0f;
 
   // flat red color - no lighting
-  outputCol = vec4(1.0, 0.0, 0.0, 1.0);
+  vec4 outputCol = vec4(1.0, 0.0, 0.0, 1.0);
 
   // grey shadows
   f += ShadowSimple(shadowMap0, lightSpacePos0);
   f = clamp(f, 0.0f, 1.0f);
   if (f > 0.0f)
     outputCol = vec4(0.2, 0.2, 0.2, 1.0);
+
+  gl_FragColor = outputCol;
 }

media/materials/programs/spotlight_shadow_demo_vp.glsl

@@ -1,23 +1,21 @@
-#version 130
-
-in vec4 position;
+#version 120
 
 uniform mat4 worldMatrix;
 uniform mat4 worldViewMatrix;
 uniform mat4 viewProjMatrix;
 
 uniform mat4 texViewProjMatrix0;
-out vec4 lightSpacePos0;
+varying vec4 lightSpacePos0;
 
-out vec4 worldPos;
-out vec4 worldViewPos;
+varying vec4 worldPos;
+varying vec4 worldViewPos;
 
 void main()
 {
-  worldPos = worldMatrix * position;
+  worldPos = worldMatrix * gl_Vertex;
   gl_Position = viewProjMatrix * worldPos;
 
-  worldViewPos = worldViewMatrix * position;
+  worldViewPos = worldViewMatrix * gl_Vertex;
 
   lightSpacePos0 = texViewProjMatrix0 * worldPos;
 }