GUI Material: Black Silhouette

Questions
1

Let’s say I have 5 characters and 4 of them are locked at the beginning of the game. In the GUI I want to show to the user only the unique silhouette of the character. I’m pretty sure that somebody has already created this and you can link me to the correct GUI MATERIAL that converts every input pixel to a black pixel.

2

If you really want black, there is a shortcut:

gui.set_color(node, vmath.vector4(0,0,0,1)

It gets trickier if you need it to be a different colour.

3

Also you can play with opacity to make it more gray or matching your background
Usually it’s enough

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5

I found a solution:

silhouette-material
silhouette-material648×390 23.8 KB

with silhouette_gui.fp being:

varying lowp vec4 var_color;
varying mediump vec2 var_texcoord0;
uniform lowp sampler2D texture_sampler;

void main()
{
	// Get pixel color from texture
	lowp vec4 color = texture2D(texture_sampler, var_texcoord0.xy);

	if (color.a > 0.0) {
		// Non-transparent pixel: Output black
		gl_FragColor = vec4(0.0, 0.0, 0.0, color.a);
	} else {
		// Transparent pixel: Output original color (should be fully transparent)
		gl_FragColor = color;
	}
}
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