Shaders: Fix OpenGL < 4.3 compatibility

SmallJoker · SmallJoker · commit 478e75329853 · 2020-02-16T14:14:34.000+01:00
diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl
@@ -46,9 +46,8 @@ float smoothTriangleWave(float x)
 	return smoothCurve(triangleWave(x)) * 2.0 - 1.0;
 }
 
-#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || \
-	MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || \
-	MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER
+// OpenGL < 4.3 does not support continued preprocessor lines
+#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER
 
 //
 // Simple, fast noise function.
@@ -115,9 +114,8 @@ float disp_z;
 
 	worldPosition = (mWorld * gl_Vertex).xyz;
 
-#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || \
-	MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || \
-	MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER
+// OpenGL < 4.3 does not support continued preprocessor lines
+#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER
 	// Generate waves with Perlin-type noise.
 	// The constants are calibrated such that they roughly
 	// correspond to the old sine waves.
@@ -188,12 +186,12 @@ float disp_z;
 	color.rgb = gl_Color.rgb * (gl_Color.a * dayLight.rgb + 
 		nightRatio * artificialLight.rgb) * 2;
 	color.a = 1;
-	
+
 	// Emphase blue a bit in darker places
 	// See C++ implementation in mapblock_mesh.cpp final_color_blend()
 	float brightness = (color.r + color.g + color.b) / 3;
 	color.b += max(0.0, 0.021 - abs(0.2 * brightness - 0.021) +
 		0.07 * brightness);
-	
+
 	gl_FrontColor = gl_BackColor = clamp(color, 0.0, 1.0);
 }
