More minor shader cleanups

client/shaders/nodes_shader/opengl_vertex.glsl

@@ -7,7 +7,6 @@ uniform highp vec3 cameraOffset;
 uniform float animationTimer;
 
 VARYING_ vec3 vNormal;
-VARYING_ vec3 vPosition;
 // World position in the visible world (i.e. relative to the cameraOffset.)
 // This can be used for many shader effects without loss of precision.
 // If the absolute position is required it can be calculated with
@@ -43,14 +42,13 @@ CENTROID_ VARYING_ float nightRatio;
 VARYING_ highp vec3 eyeVec;
 // Color of the light emitted by the light sources.
 const vec3 artificialLight = vec3(1.04, 1.04, 1.04);
-const float e = 2.718281828459;
-const float BS = 10.0;
+
+#ifdef ENABLE_DYNAMIC_SHADOWS
+
 uniform float xyPerspectiveBias0;
 uniform float xyPerspectiveBias1;
 uniform float zPerspectiveBias;
 
-#ifdef ENABLE_DYNAMIC_SHADOWS
-
 vec4 getRelativePosition(in vec4 position)
 {
 	vec2 l = position.xy - CameraPos.xy;
@@ -77,14 +75,16 @@ vec4 applyPerspectiveDistortion(in vec4 position)
 	return position;
 }
 
-// custom smoothstep implementation because it's not defined in glsl1.2
-// https://docs.gl/sl4/smoothstep
+#if __VERSION__ >= 130
+#define mtsmoothstep smoothstep
+#else
 float mtsmoothstep(in float edge0, in float edge1, in float x)
 {
 	float t = clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0);
 	return t * t * (3.0 - 2.0 * t);
 }
 #endif
+#endif
 
 
 float smoothCurve(float x)
@@ -189,7 +189,6 @@ void main(void)
 	worldPosition = (mWorld * pos).xyz;
 	gl_Position = mWorldViewProj * pos;
 
-	vPosition = gl_Position.xyz;
 	eyeVec = -(mWorldView * pos).xyz;
 #ifdef SECONDSTAGE
 	normalPass = normalize((inVertexNormal+1)/2);