Add overlay blending and update ECS transform logic

Added overlay and hard light blending functions to util.shdinc for improved shader compositing. Marked brl::random as inline for header safety. Updated EcsEntity::calculateTransform to use local transform properties and parent transforms for correct hierarchical transformations. Added and updated various test assets and textures for tinyswords tower models.

Author: UntitledOutput

default_assets/shaders/util.shdinc

@@ -44,4 +44,28 @@ int getShadeIndex(vec3 v) {
 
 
     return -1;
-}
+}
+
+float calculateLuminance(vec3 rgbColor) {
+    return 0.2126 * rgbColor.r + 0.7152 * rgbColor.g + 0.0722 * rgbColor.b;
+}
+
+float blendOverlay(float base, float blend) {
+	return base<0.5?(2.0*base*blend):(1.0-2.0*(1.0-base)*(1.0-blend));
+}
+
+vec3 blendOverlay(vec3 base, vec3 blend) {
+	return vec3(blendOverlay(base.r,blend.r),blendOverlay(base.g,blend.g),blendOverlay(base.b,blend.b));
+}
+
+vec3 blendOverlay(vec3 base, vec3 blend, float opacity) {
+	return (blendOverlay(base, blend) * opacity + base * (1.0 - opacity));
+}
+
+vec3 blendHardLight(vec3 base, vec3 blend) {
+	return blendOverlay(blend,base);
+}
+
+vec3 blendHardLight(vec3 base, vec3 blend, float opacity) {
+	return (blendHardLight(base, blend) * opacity + base * (1.0 - opacity));
+}

include/borealis/util/random.hpp

@@ -5,7 +5,7 @@
 
 namespace brl
 {
-    int random(int min, int max) {
+    inline int random(int min, int max) {
         return  min + (std::rand() % (max - min + 1));
     }
 } // namespace brl

src/brl/ecs/entity.cpp

@@ -157,9 +157,14 @@ glm::mat4 brl::EcsEntity::calculateTransform()
 {
     glm::mat4 t(1.0);
 
-    t = translate(t, position());
-    t *= toMat4(rotation());
-    t = glm::scale(t, scale());
+    t = translate(t, localPosition);
+    t *= toMat4(localRotation);
+    t = glm::scale(t, localScale);
+
+    if (parent)
+    {
+        t = parent->calculateTransform() * t;
+    }
 
     return t;
 }