Pixel-Composer/scripts/node_trail/node_trail.gml
2022-12-27 10:00:50 +07:00

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function Node_Trail(_x, _y, _group = -1) : Node_Processor(_x, _y, _group) constructor {
name = "Trail";
use_cache = true;
inputs[| 0] = nodeValue(0, "Surface in", self, JUNCTION_CONNECT.input, VALUE_TYPE.surface, 0);
inputs[| 1] = nodeValue(1, "Max life", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 3);
inputs[| 2] = nodeValue(2, "Step", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 1);
inputs[| 3] = nodeValue(3, "Alpha decrease", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 0)
.setDisplay(VALUE_DISPLAY.slider, [0, 1, 0.01]);
inputs[| 4] = nodeValue(4, "Blend mode", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 0)
.setDisplay(VALUE_DISPLAY.enum_scroll, BLEND_TYPES );
outputs[| 0] = nodeValue(0, "Surface out", self, JUNCTION_CONNECT.output, VALUE_TYPE.surface, PIXEL_SURFACE);
input_display_list = [
["Trail settings", false], 0, 1, 2, 4, 3
];
temp_surf = [ PIXEL_SURFACE, PIXEL_SURFACE ];
static process_data = function(_outSurf, _data, _output_index) {
if(!inputs[| 0].value_from)
return _outSurf;
if(array_length(cached_output) != ANIMATOR.frames_total + 1)
return _outSurf
for(var i = 0; i < 2; i++) {
temp_surf[i] = surface_verify(temp_surf[i], surface_get_width(_outSurf), surface_get_height(_outSurf));
surface_set_target(temp_surf[i]);
draw_clear_alpha(0, 0);
surface_reset_target();
}
var _life = _data[1];
var _step = _data[2];
var _alpha = _data[3];
var _blend = _data[4];
var aa = 1;
var res_index = 0;
var frame_amo = min(_life, floor(ANIMATOR.current_frame / _step));
var st_frame = ANIMATOR.current_frame - frame_amo * _step;
for(var i = 0; i <= _life; i++) {
var frame_idx = clamp(st_frame + i * _step, 0, ANIMATOR.frames_total - 1);
var bg = i % 2;
var fg = !bg;
var aa = 1 - _alpha * (_life - i);
surface_set_target(temp_surf[bg]);
if(i == _life)
draw_surface_safe(_data[0], 0, 0);
else if(is_surface(cached_output[frame_idx]))
draw_surface_blend(temp_surf[fg], cached_output[frame_idx], _blend, aa);
surface_reset_target();
res_index = bg;
}
surface_set_target(_outSurf);
draw_clear_alpha(0, 0);
BLEND_OVER
draw_surface_safe(temp_surf[res_index], 0, 0);
BLEND_NORMAL
surface_reset_target();
cacheCurrentFrame(_data[0]);
return _outSurf;
}
}