Discard discard

- Do not guard discard predicate on a compile definition because it
  doesn't matter for ubershaders.

src/main/java/com/jozufozu/flywheel/backend/compile/component/MaterialAdapterComponent.java

@@ -21,13 +21,12 @@ import com.jozufozu.flywheel.glsl.generate.GlslSwitch;
 import net.minecraft.resources.ResourceLocation;
 
 public class MaterialAdapterComponent implements SourceComponent {
-	// TODO: material id handling in pipeline shader
 	private final ResourceLocation name;
 	private final GlslExpr switchArg;
 	private final List<AdaptedFn> functionsToAdapt;
 	private final List<StringSubstitutionSourceComponent> adaptedComponents;
 
-	public MaterialAdapterComponent(ResourceLocation name, GlslExpr switchArg, List<AdaptedFn> functionsToAdapt, List<StringSubstitutionSourceComponent> adaptedComponents) {
+	private MaterialAdapterComponent(ResourceLocation name, GlslExpr switchArg, List<AdaptedFn> functionsToAdapt, List<StringSubstitutionSourceComponent> adaptedComponents) {
 		this.name = name;
 		this.switchArg = switchArg;
 		this.functionsToAdapt = functionsToAdapt;

src/main/resources/assets/flywheel/flywheel/api/fragment.glsl

@@ -29,10 +29,7 @@ vec2 flw_fragLight;
 vec4 flw_fogFilter(vec4 color);
 
 /*
- * May be implemented by materials.
- * If implemented, a material must define FLW_DISCARD
- *
- * Guard calls with FLW_DISCARD
+ * Must be implemented by materials.
  */
 bool flw_discardPredicate(vec4 finalColor);
 #endif

src/main/resources/assets/flywheel/flywheel/context/crumbling.frag

@@ -34,11 +34,9 @@ void flw_initFragment() {
 void flw_contextFragment() {
     vec4 color = flw_fragColor;
 
-    #ifdef FLW_DISCARD
     if (flw_discardPredicate(color)) {
         discard;
     }
-    #endif
 
     fragColor = flw_fogFilter(color);
 }

src/main/resources/assets/flywheel/flywheel/context/world.frag

@@ -28,11 +28,9 @@ void flw_contextFragment() {
     color.rgb = mix(overlayColor.rgb, color.rgb, overlayColor.a);
     color *= lightColor;
 
-    #ifdef FLW_DISCARD
-      if (flw_discardPredicate(color)) {
+    if (flw_discardPredicate(color)) {
         discard;
     }
-    #endif
 
     fragColor = flw_fogFilter(color);
 }

src/main/resources/assets/flywheel/flywheel/material/cutout.frag

@@ -4,7 +4,6 @@
 void flw_materialFragment() {
 }
 
-#define FLW_DISCARD
 bool flw_discardPredicate(vec4 finalColor) {
     return finalColor.a < 0.1;
 }

src/main/resources/assets/flywheel/flywheel/material/default.frag

@@ -4,6 +4,10 @@
 void flw_materialFragment() {
 }
 
+bool flw_discardPredicate(vec4 finalColor) {
+    return false;
+}
+
 vec4 flw_fogFilter(vec4 color) {
     return linear_fog(color, flw_distance, flywheel.fogRange.x, flywheel.fogRange.y, flywheel.fogColor);
 }