Refactor rendertype_lines shaders

Author: xCollateral

src/main/resources/assets/vulkanmod/shaders/minecraft/core/rendertype_lines/rendertype_lines.fsh

@@ -26,19 +26,4 @@ void main() {
     fragColor = linear_fog(color, vertexDistance, FogStart, FogEnd, FogColor);
 }
 
-/*
-#version 150
-
-#moj_import <fog.glsl>
-
-uniform vec4 ColorModulator;
-uniform float FogStart;
-uniform float FogEnd;
-uniform vec4 FogColor;
-
-in float vertexDistance;
-in vec4 vertexColor;
-
-out vec4 fragColor;
-*/
 

src/main/resources/assets/vulkanmod/shaders/minecraft/core/rendertype_lines/rendertype_lines.vsh

@@ -36,8 +36,7 @@ void main() {
         lineOffset *= -1.0;
     }
 
-    int div = (gl_VertexIndex / 2);
-    if (gl_VertexIndex - div * 2 == 0) {
+    if (mod(gl_VertexIndex, 2) == 0) {
         gl_Position = vec4((ndc1 + vec3(lineOffset, 0.0)) * linePosStart.w, linePosStart.w);
     } else {
         gl_Position = vec4((ndc1 - vec3(lineOffset, 0.0)) * linePosStart.w, linePosStart.w);
@@ -47,18 +46,3 @@ void main() {
     vertexColor = Color;
 }
 
-// #version 150
-//
-// in vec3 Position;
-// in vec4 Color;
-// in vec3 Normal;
-//
-// uniform mat4 ModelViewMat;
-// uniform mat4 ProjMat;
-// uniform float LineWidth;
-// uniform vec2 ScreenSize;
-//
-// out float vertexDistance;
-// out vec4 vertexColor;
-
-