Pixel-Composer/scripts/node_sdf/node_sdf.gml

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function Node_SDF(_x, _y, _group = noone) : Node_Processor(_x, _y, _group) constructor {
name = "SDF";
uniform_sdf_dim = shader_get_uniform(sh_sdf, "dimension");
uniform_sdf_stp = shader_get_uniform(sh_sdf, "stepSize");
uniform_sdf_sid = shader_get_uniform(sh_sdf, "side");
uniform_dst_sid = shader_get_uniform(sh_sdf_dist, "side");
uniform_dst_dst = shader_get_uniform(sh_sdf_dist, "max_distance");
inputs[| 0] = nodeValue("Surface in", self, JUNCTION_CONNECT.input, VALUE_TYPE.surface, noone);
inputs[| 1] = nodeValue("Active", self, JUNCTION_CONNECT.input, VALUE_TYPE.boolean, true);
active_index = 1;
inputs[| 2] = nodeValue("Side", self, JUNCTION_CONNECT.input, VALUE_TYPE.integer, 2)
.setDisplay(VALUE_DISPLAY.enum_button, [ "Inside", "Outside", "Both" ]);
inputs[| 3] = nodeValue("Max distance", self, JUNCTION_CONNECT.input, VALUE_TYPE.float, 1)
.setDisplay(VALUE_DISPLAY.slider, { range: [ 0, 2, 0.01 ] });
outputs[| 0] = nodeValue("Surface out", self, JUNCTION_CONNECT.output, VALUE_TYPE.surface, noone);
input_display_list = [ 1,
["Surfaces", false], 0,
["SDF", false], 2, 3,
]
attribute_surface_depth();
temp_surface = [ surface_create(1, 1), surface_create(1, 1) ];
static processData = function(_outSurf, _data, _output_index, _array_index) { #region
var inSurf = _data[0];
var _side = _data[2];
var _dist = _data[3];
var sw = surface_get_width_safe(inSurf);
var sh = surface_get_height_safe(inSurf);
var _n = max(sw, sh);
var cDep = attrDepth();
temp_surface[0] = surface_verify(temp_surface[0], _n, _n, cDep);
temp_surface[1] = surface_verify(temp_surface[1], _n, _n, cDep);
_outSurf = surface_verify(_outSurf, sw, sh, cDep);
surface_set_shader(temp_surface[0], sh_sdf_tex);
draw_surface_safe(inSurf);
surface_reset_shader();
var _step = ceil(log2(_n));
var stepSize = power(2, _step);
var bg = 0;
repeat(_step) {
stepSize /= 2;
bg = !bg;
surface_set_shader(temp_surface[bg], sh_sdf);
shader_set_uniform_f(uniform_sdf_dim, _n, _n );
shader_set_uniform_f(uniform_sdf_stp, stepSize);
shader_set_uniform_i(uniform_sdf_sid, _side);
draw_surface_safe(temp_surface[!bg]);
surface_reset_shader();
}
surface_set_shader(_outSurf, sh_sdf_dist);
shader_set_uniform_i(uniform_dst_sid, _side);
shader_set_uniform_f(uniform_dst_dst, _dist);
draw_surface_safe(temp_surface[bg]);
surface_reset_shader();
return _outSurf;
} #endregion
}