2 files changed, 151 insertions, 0 deletions

diff --git a/assets/minecraft/shaders/include/emissive_utils.glsl b/assets/minecraft/shaders/include/emissive_utils.glsl
new file mode 100755
index 00000000..d0c999cb
--- /dev/null
+++ b/assets/minecraft/shaders/include/emissive_utils.glsl
@@ -0,0 +1,102 @@
+#version 150
+
+// Checking for the exact alpha value breaks things, so I use this function to cut down on space while also making it work better.
+
+bool check_alpha(float textureAlpha, float targetAlpha) {
+        
+        float targetLess = targetAlpha - 0.01;
+        float targetMore = targetAlpha + 0.01;
+        return (textureAlpha > targetLess && textureAlpha < targetMore);
+        
+}
+
+
+// For cases in which you want something to have a lower light level, but still be bright when in light.
+
+vec4 apply_partial_emissivity(vec4 inputColor, vec4 originalLightColor, vec3 minimumLightColor) {
+        
+        vec4 newLightColor = originalLightColor;
+        newLightColor.r = max(originalLightColor.r, minimumLightColor.r);
+        newLightColor.g = max(originalLightColor.g, minimumLightColor.g);
+        newLightColor.b = max(originalLightColor.b, minimumLightColor.b);
+        return inputColor * newLightColor;
+        
+}
+
+
+// The meat and bones of the pack, does all the work for making things emissive.
+
+vec4 make_emissive(vec4 inputColor, vec4 lightColor, vec4 maxLightColor, float vertexDistance, float inputAlpha) {
+        
+        if (vertexDistance > 800) return inputColor; // Vertex Distance > 800 generally means an object is in the UI, which we don't want to affect.
+        
+        if (check_alpha(inputAlpha, 252.0)) return inputColor; // Checks for alpha 252 and just returns the input color if it is. Used in the example pack for redstone ore and the zombie's eyes.
+        else if (check_alpha(inputAlpha, 251.0)) return apply_partial_emissivity(inputColor, lightColor, vec3(0.411, 0.345, 0.388)); // Used in the example pack for ice.
+        else if (check_alpha(inputAlpha, 250.0)) return inputColor; // You can copy & this line and change the function to add a new emissive type. Used in the example pack for lime concrete. 
+        
+        else return inputColor * lightColor; // If none of the pixels are supposed to be emissive, then it adds the light.
+        
+}
+
+
+// Gets the dimension that an object is in, -1 for The Nether, 0 for The Overworld, 1 for The End.
+
+float get_dimension(vec4 minLightColor) {
+        
+        if (minLightColor.r == minLightColor.g && minLightColor.g == minLightColor.b) return 0.0; // Shadows are grayscale in The Overworld
+        else if (minLightColor.r > minLightColor.g) return -1.0; // Shadows are more red in The Nether
+        else return 1.0; // Shadows are slightly green in The End
+        
+}
+
+
+// Gets the face lighting of a block. Credits to Venaxsys for the original function.
+
+vec4 get_face_lighting(vec3 normal, float dimension) { 
+        
+        vec4 faceLighting = vec4(1.0, 1.0, 1.0, 1.0);
+        vec3 absNormal = abs(normal);
+        float top = 229.0 / 255.0;
+        float bottom = 127.0 / 255.0;
+        float east = 153.0 / 255.0;
+        float north = 204.0 / 255.0;
+        
+        // Top (only required in the Nether)
+        if (normal.y > normal.z && normal.y > normal.x && check_alpha(dimension, -1.0)) faceLighting = vec4(top, top, top, 1.0); // It's not really checking the alpha but I'm too stubborn to change the function name
+        
+        // Bottom
+        if (normal.y < normal.z && normal.y < normal.x && !check_alpha(dimension, -1.0)) faceLighting = vec4(bottom, bottom, bottom, 1.0);
+        else if (normal.y < normal.z && normal.y < normal.x && check_alpha(dimension, -1.0)) faceLighting = vec4(top, top, top, 1.0);
+
+        // East-West
+        if (absNormal.x > absNormal.z && absNormal.x > absNormal.y) faceLighting = vec4(east, east, east, 1.0);
+
+        // North-South
+        if (absNormal.z > absNormal.x && absNormal.z > absNormal.y) faceLighting = vec4(north, north, north, 1.0);
+
+        return faceLighting;
+}
+
+
+// Checks the alpha and removes face lighting if required.
+
+vec4 face_lighting_check(vec3 normal, float inputAlpha, float dimension) {
+
+        if (check_alpha(inputAlpha, 250.0)) return get_face_lighting(normal, dimension); // Checks for alpha 250, and runs it through the remove_face_lighting() function if it is. Used in the example pack for lime concrete.
+        else return vec4(1.0, 1.0, 1.0, 1.0); // If the block doesn't need to have its face lighting removed, returns 1.0 so nothing gets divided.
+        
+}
+
+
+// Makes sure transparent things don't become solid and vice versa.
+
+float remap_alpha(float inputAlpha) {
+        
+        if (check_alpha(inputAlpha, 252.0)) return 255.0; // Checks for alpha 252 and converts all pixels of that to alpha 255. Used in the example pack for redstone ore and the zombie's eyes.
+        else if (check_alpha(inputAlpha, 251.0)) return 190.0; // You can copy & paste this line and change the values to make any transparent block work with this pack. Used in the example pack for ice.
+        else if (check_alpha(inputAlpha, 250.0)) return 255.0; // Used in the example pack for lime concrete.
+        
+        else return inputAlpha; // If a pixel doesn't need to have its alpha changed then it simply does not change.
+        
+}
+
diff --git a/assets/minecraft/shaders/include/player.glsl b/assets/minecraft/shaders/include/player.glsl
new file mode 100755
index 00000000..a421a1ff
--- /dev/null
+++ b/assets/minecraft/shaders/include/player.glsl
@@ -0,0 +1,49 @@
+if (player == 2 && color.rgb == vec3(0.0)) {
+    color.a = 0.0;
+}
+
+float emissive = 0.0;
+float damage = 0.25;
+
+for (int i = 0; i < 4; i++) {
+    for (int j = 0; j < 4; j++) {
+        vec4 control = texelFetch(Sampler0, ivec2(36 + i, 16 + j), 0);
+        if (control.rgb == color.rgb) {
+            emissive = 1.0;
+        }
+    }
+}
+
+if (settings2.r > 0.99) {
+    damage = 0.0;
+}
+
+if (overlayColor.a < 0.99) {
+    if (texelFetch(Sampler0, ivec2(2, 16), 0).r > 0.99) {
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 4; j++) {
+                vec4 control = texelFetch(Sampler0, ivec2(12 + i, 16 + j), 0);
+                if (control.rgb == color.rgb) {
+                    damage = 0.25;
+                }
+            }
+        }
+        for (int i = 0; i < 4; i++) {
+            for (int j = 0; j < 4; j++) {
+                vec4 control = texelFetch(Sampler0, ivec2(16 + i, 16 + j), 0);
+                if (control.rgb == color.rgb) {
+                    damage = 1.0;
+                }
+            }
+        }
+    }
+    color.rgb = mix(color.rgb, overlayColor.rgb, damage);
+}
+
+color *= ColorModulator;
+
+if (settings.g != 1.0 || emissive != 1.0) {
+    color *= lightMapColor * vertexColor;
+}
+
+fragColor = linear_fog(color, vertexDistance, FogStart, FogEnd, FogColor);