7-9-25 3:44am

shaders/globe.gdshader

@@ -0,0 +1,35 @@
+shader_type canvas_item;
+
+uniform float scroll_x = 0.0;
+uniform float scroll_y = 0.0;
+
+uniform float globe_magnitude : hint_range(0.0, 1.0) = 1.0;
+
+void fragment()
+{
+	// Original UVs from 0 to 1
+	vec2 uv = UV;
+	//uv.x = mod(uv.x + x_scroll, 1.0);
+    //uv.y = mod(uv.y + y_scroll, 1.0);
+	
+	// Remaps UV to -1, 1, i.e. centers on the sprite
+	vec2 centered_uv = uv * 2.0 - 1.0;
+	
+	// Radius r of length of the centered UV
+	float r = length(centered_uv);
+	if (r > 1.0)
+	{
+		discard; // clips anything past the radius of the circle
+	}
+	
+	float z = sqrt(1.0 - r * r);
+	
+	vec2 sphere_uv = centered_uv / (1.0 + z);
+	sphere_uv.x = mod(sphere_uv.x + scroll_x, 1.0);
+    sphere_uv.y = mod(sphere_uv.y + scroll_y, 1.0);
+	sphere_uv = sphere_uv * 0.5 + 0.5;
+	
+	vec2 final_uv = mix(uv, sphere_uv, globe_magnitude);
+	
+	COLOR = texture(TEXTURE, final_uv);
+}