Update #18 - Final release, added PBR shaders

sources/resources/assets/eagler/glsl/deferred/skybox_render.fsh

@@ -0,0 +1,60 @@
+#line 2
+
+/*
+ * Copyright (c) 2023 LAX1DUDE. All Rights Reserved.
+ * 
+ * WITH THE EXCEPTION OF PATCH FILES, MINIFIED JAVASCRIPT, AND ALL FILES
+ * NORMALLY FOUND IN AN UNMODIFIED MINECRAFT RESOURCE PACK, YOU ARE NOT ALLOWED
+ * TO SHARE, DISTRIBUTE, OR REPURPOSE ANY FILE USED BY OR PRODUCED BY THE
+ * SOFTWARE IN THIS REPOSITORY WITHOUT PRIOR PERMISSION FROM THE PROJECT AUTHOR.
+ * 
+ * NOT FOR COMMERCIAL OR MALICIOUS USE
+ * 
+ * (please read the 'LICENSE' file this repo's root directory for more info) 
+ * 
+ */
+
+precision lowp int;
+precision highp float;
+precision highp sampler2D;
+
+in vec3 v_position3f;
+in vec3 v_color3f;
+
+layout(location = 0) out vec4 output4f;
+
+uniform vec3 u_sunDirection3f;
+uniform vec3 u_sunColor3f;
+uniform vec4 u_lightningColor4f;
+
+#ifdef COMPILE_CLOUDS
+uniform sampler2D u_cloudsTexture;
+#endif
+
+uniform sampler2D u_sunOcclusion;
+
+#define SKY_BRIGHTNESS 5.0
+
+void main() {
+	gl_FragDepth = 0.0;
+	vec3 viewDir = normalize(v_position3f);
+#ifdef COMPILE_PARABOLOID_SKY
+	output4f = vec4(v_color3f * SKY_BRIGHTNESS, 0.0);
+#else
+	float f = max(dot(viewDir, u_sunDirection3f) - 0.995, 0.0) * 100.0;
+	float intensity = min(f * 2.0, 1.0);
+	intensity *= intensity * intensity * intensity * textureLod(u_sunOcclusion, vec2(0.5, 0.5), 0.0).r * 2.0;
+	output4f = vec4(v_color3f * SKY_BRIGHTNESS + intensity * u_sunColor3f, 0.0);
+#endif
+#ifdef COMPILE_CLOUDS
+	if(viewDir.y < 0.01) {
+		output4f.rgb = output4f.rgb * u_lightningColor4f.a + u_lightningColor4f.rgb;
+		return;
+	}
+	vec2 cloudSampleCoord2f = (viewDir.xz / (viewDir.y + 1.0)) * 0.975 * 0.5 + 0.5;
+	vec4 cloudSample = textureLod(u_cloudsTexture, cloudSampleCoord2f, 0.0);
+	output4f.rgb = mix(output4f.rgb, output4f.rgb * cloudSample.a + cloudSample.rgb, smoothstep(0.0, 1.0, min(viewDir.y * 8.0, 1.0)));
+#endif
+	output4f.rgb = output4f.rgb * u_lightningColor4f.a + u_lightningColor4f.rgb;
+
+}