Add shader loading functionality

[no changelog]

src/main/kotlin/util/render/FirmamentShaders.kt

@@ -0,0 +1,23 @@
+package moe.nea.firmament.util.render
+
+import net.minecraft.client.gl.ShaderProgram
+import net.minecraft.client.render.RenderPhase
+import net.minecraft.client.render.VertexFormats
+import moe.nea.firmament.annotations.Subscribe
+import moe.nea.firmament.events.RegisterCustomShadersEvent
+
+object FirmamentShaders {
+
+
+    private lateinit var _LINES: ShaderProgram
+    val LINES = RenderPhase.ShaderProgram({ _LINES })
+
+    @Subscribe
+    fun registerCustomShaders(event: RegisterCustomShadersEvent) {
+        event.register(
+            "firmament_rendertype_lines",
+            VertexFormats.LINES,
+            { _LINES = it },
+        )
+    }
+}

src/main/kotlin/util/render/RenderInWorldContext.kt

@@ -56,7 +56,7 @@ class RenderInWorldContext private constructor(
                                    false, false, // do we need translucent? i dont think so
                                    RenderLayer.MultiPhaseParameters.builder()
                                        .depthTest(RenderPhase.ALWAYS_DEPTH_TEST)
-                                       .program(RenderPhase.LINES_PROGRAM)
+                                       .program(FirmamentShaders.LINES)
                                        .build(false)
                                    )
     }
@@ -172,7 +172,7 @@ class RenderInWorldContext private constructor(
         points.zipWithNext().forEach { (a, b) ->
             val normal = Vector3f(b.x.toFloat(), b.y.toFloat(), b.z.toFloat())
                 .sub(a.x.toFloat(), a.y.toFloat(), a.z.toFloat())
-                .normalize()
+//                .normalize()
             val lastNormal0 = lastNormal ?: normal
             lastNormal = normal
             buffer.vertex(matrix.positionMatrix, a.x.toFloat(), a.y.toFloat(), a.z.toFloat())