First adjustments to the Entity System to make it work with different types

shader/HSV.gdshader

@@ -12,6 +12,9 @@ uniform float brightness_add  : hint_range(-1.0, 1.0) = 0.0;
 // Contrast multiplier in RGB space. 1.0 means no change.
 uniform float contrast_mult   : hint_range(0.0, 2.0) = 1.0;
 
+//Cached Color value to reapply modulate
+varying vec4 modulate;
+
 // Converts an RGB color to HSV.
 vec3 rgb2hsv(vec3 c) {
     float cMax = max(max(c.r, c.g), c.b);
@@ -65,6 +68,10 @@ vec3 hsv2rgb(vec3 c) {
     return rgb + vec3(m);
 }
 
+void vertex(){
+	modulate = COLOR;
+}
+
 void fragment() {
     // Get the original texture color.
     vec4 tex_color = texture(TEXTURE, UV);
@@ -89,4 +96,6 @@ void fragment() {
 
     // Output the final color while preserving the original alpha.
     COLOR = vec4(col, tex_color.a);
+	//reapply vertex color value to keep modulate changes
+	COLOR = COLOR * modulate;
 }

shader/repeat_texture.gdshader

@@ -2,8 +2,14 @@ shader_type canvas_item;
 
 uniform vec2 tiling_scale = vec2(5.0, 5.0);
 uniform sampler2D noise : repeat_enable;
+varying vec4 modulate;
+
+void vertex() {
+	modulate = COLOR;
+}
 
 void fragment() {
     vec2 uv = vec2(UV.x * tiling_scale.x, UV.y * tiling_scale.y); // Change 10.0 to control tiling scale
     COLOR = texture(TEXTURE, fract(uv));
+	COLOR = COLOR * modulate;
 }

shader/swaying_plant.gdshader

@@ -26,6 +26,9 @@ uniform float heightOffset : hint_range(0.0, 1.0);
 // With the offset value, you can if you want different moves for each asset. Just put a random value (1, 2, 3) in the editor. Don't forget to mark the material as unique if you use this
 uniform float offset = 0;
 
+// caching color settings to reapply modulate value
+varying vec4 modulate;
+
 float getWind(vec2 vertex, vec2 uv, float time){
     float diff = pow(maxStrength - minStrength, 2.0);
     float strength = clamp(minStrength + diff + sin(time / interval) * diff, minStrength, maxStrength) * strengthScale;
@@ -47,8 +50,13 @@ float noise(vec2 x) {
 }
 
 void vertex() {
+	modulate = COLOR;
     vec4 pos = MODEL_MATRIX * vec4(0.0, 0.0, 0.0, 1.0);
     //float time = TIME * speed + sin(VERTEX.x * noise(VERTEX.xy) * offset);
     float time = TIME * speed + sin(pos.x * offset) * cos( pos.x * offset)  ;
     VERTEX.x += getWind(VERTEX.xy, UV, time);
 }
+
+void fragment() {
+  COLOR = modulate * COLOR;
+}