armorpaint/paint/sources/material_nodes/map_range_node.c

#include "../global.h"

void map_range_node_init() {
	any_array_push(nodes_material_utilities, map_range_node_def);
	any_map_set(parser_material_node_values, "MAPRANGE", map_range_node_value);
}

char *map_range_node_value(ui_node_t *node, ui_node_socket_t *socket) {
	char *val       = parser_material_parse_value_input(node->inputs->buffer[0], false);
	char *fmin      = parser_material_parse_value_input(node->inputs->buffer[1], false);
	char *fmax      = parser_material_parse_value_input(node->inputs->buffer[2], false);
	char *tmin      = parser_material_parse_value_input(node->inputs->buffer[3], false);
	char *tmax      = parser_material_parse_value_input(node->inputs->buffer[4], false);
	bool  use_clamp = node->buttons->buffer[0]->default_value->buffer[0] > 0;
	char *a         = string("((%s - %s) / (%s - %s))", tmin, tmax, fmin, fmax);
	char *out_val   = string("(%s * %s + %s - %s * %s)", a, val, tmin, a, fmin);
	if (use_clamp) {
		return string("(clamp(%s, %s, %s))", out_val, tmin, tmax);
	}
	else {
		return out_val;
	}
}