monolith

#version 450

#extension GL_GOOGLE_include_directive : require

#include "push.glsl"

#include "clip.glsl"

layout(set = 0, binding = 0) uniform sampler2D tex;

layout(location = 0) in vec2 v_uv;

layout(location = 0) out vec4 out_color;

const int MOVE = 0;

const int SPAWN = 1;

const int CLOSE = 2;

// The transition hook. Custom shaders will replace this function.

vec4 effect(vec4 color, vec2 uv, float progress, int kind) {

    if (kind == SPAWN) {

        return color * progress;

    }

    if (kind == CLOSE) {

        return color * (1.0 - progress);

    }

    return color;

}

void main() {

    vec4 color = texture(tex, v_uv) * pc.color.a;

    out_color = effect(color, v_uv, pc.effect.x, int(pc.effect.y)) * clip_alpha();

}