Pixel-Composer/scripts/node_trail/node_trail.gml
2024-08-08 11:57:51 +07:00

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function Node_Trail(_x, _y, _group = noone) : Node(_x, _y, _group) constructor {
name = "Trail";
use_cache = CACHE_USE.manual;
clearCacheOnChange = false;
inputs[0] = nodeValue_Surface("Surface in", self);
inputs[1] = nodeValue_Int("Max life", self, 5);
inputs[2] = nodeValue_Bool("Loop", self, false);
inputs[3] = nodeValue_Int("Max distance", self, -1, "Maximum distance to search for movement, set to -1 to search the entire image.");
inputs[4] = nodeValue_Bool("Match color", self, true, "Make trail track pixels of the same color, instead of the closet pixels.");
inputs[5] = nodeValue_Bool("Blend color", self, true, "Blend color between two pixel smoothly.");
inputs[6] = nodeValue("Alpha over life", self, JUNCTION_CONNECT.input, VALUE_TYPE.curve, CURVE_DEF_11);
outputs[0] = nodeValue_Output("Surface out", self, VALUE_TYPE.surface, noone);
outputs[1] = nodeValue_Output("Trail UV", self, VALUE_TYPE.surface, noone);
input_display_list = [
["Surfaces", true], 0,
["Trail settings", false], 1, 2,
["Tracking", false], 3, 4, 5,
["Modification", false], 6,
];
temp_surface = [ surface_create(1, 1), surface_create(1, 1), surface_create(1, 1) ];
cached_trail = [];
attribute_surface_depth();
insp2UpdateTooltip = "Clear cache";
insp2UpdateIcon = [ THEME.cache, 0, COLORS._main_icon ];
static onInspector2Update = function() {
clearCache(true);
for( var i = 0, n = array_length(cached_trail); i < n; i++ )
surface_free_safe(cached_trail[i]);
cached_trail = [];
}
static step = function() {
var _colr = getInputData(4);
inputs[5].setVisible(!_colr);
}
static update = function() {
if(!inputs[0].value_from) return;
var _surf = getInputData(0);
var _life = getInputData(1);
var _loop = getInputData(2);
if(!is_real(_loop)) _loop = false;
var _rang = getInputData(3);
var _colr = getInputData(4);
var _blend = getInputData(5);
var _alpha = getInputData(6);
var cDep = attrDepth();
if(!is_surface(_surf)) return;
cacheCurrentFrame(_surf);
for( var i = 0, n = array_length(temp_surface); i < n; i++ ) {
temp_surface[i] = surface_verify(temp_surface[i], surface_get_width_safe(_surf), surface_get_height_safe(_surf), cDep);
surface_set_target(temp_surface[i]);
DRAW_CLEAR
surface_reset_target();
}
var _outSurf = outputs[0].getValue();
_outSurf = surface_verify(_outSurf, surface_get_width_safe(_surf), surface_get_height_safe(_surf), cDep);
outputs[0].setValue(_outSurf);
var _outUV = outputs[1].getValue();
_outUV = surface_verify(_outUV, surface_get_width_safe(_surf), surface_get_height_safe(_surf), cDep);
outputs[1].setValue(_outUV);
var curf = CURRENT_FRAME;
var frame_amo = _loop? _life : min(_life, curf);
var st_frame = curf - frame_amo;
for(var i = 0; i <= frame_amo; i++) {
var frame_idx = st_frame + i;
var prog = (frame_idx - (curf - _life)) / _life;
var a0 = eval_curve_x(_alpha, 1 - i / (frame_amo + 1));
var a1 = eval_curve_x(_alpha, 1 - (i + 1) / (frame_amo + 1));
if(_loop && frame_idx < 0) frame_idx = TOTAL_FRAMES + frame_idx;
var prev = _loop? safe_mod(frame_idx - 1 + TOTAL_FRAMES, TOTAL_FRAMES) : frame_idx - 1;
var _prevFrame = getCacheFrame(prev);
var _currFrame = getCacheFrame(frame_idx);
if(!is_surface(_currFrame)) continue;
if(!is_surface(_prevFrame)) {
surface_set_target(temp_surface[0]);
draw_surface_ext_safe(_currFrame, 0, 0, 1, 1, 0, c_white, a0);
surface_reset_target();
surface_set_target(temp_surface[2]);
draw_surface_ext_safe(_currFrame, 0, 0, 1, 1, 0, c_white, a1);
surface_reset_target();
continue;
}
shader_set(sh_trail_filler_pass1);
shader_set_dim("dimension", _surf);
shader_set_f("range", _rang? _rang : surface_get_width_safe(_surf) / 2);
shader_set_i("matchColor", _colr);
shader_set_i("blendColor", _blend);
shader_set_f("segmentStart", (frame_amo - i) / frame_amo);
shader_set_f("segmentSize", 1 / frame_amo);
shader_set_surface("prevFrame", _prevFrame);
shader_set_f("alphaPrev", a0);
shader_set_f("alphaCurr", a1);
surface_set_target(temp_surface[0]);
shader_set_i("mode", 1);
draw_surface_safe(_currFrame);
surface_reset_target();
surface_set_target(temp_surface[2]);
shader_set_i("mode", 0);
draw_surface_safe(_currFrame);
surface_reset_target();
shader_reset();
}
surface_set_target(temp_surface[1]);
shader_set(sh_trail_filler_pass2);
shader_set_dim("dimension", _surf);
draw_surface_safe(temp_surface[0]);
shader_reset();
surface_reset_target();
surface_set_shader(_outUV);
draw_surface_safe(temp_surface[1]);
surface_reset_shader();
surface_set_shader(_outSurf);
draw_surface_safe(temp_surface[2]);
surface_reset_shader();
}
}