mirror of
https://github.com/Relintai/pandemonium_engine.git
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109 lines
4.7 KiB
C++
109 lines
4.7 KiB
C++
/*************************************************************************/
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/* gsai_pursue.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* PANDEMONIUM ENGINE */
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/* https://github.com/Relintai/pandemonium_engine */
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/*************************************************************************/
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/* Copyright (c) 2022-present Péter Magyar. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "gsai_pursue.h"
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#include "core/math/math_funcs.h"
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#include "../gsai_steering_agent.h"
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#include "../gsai_target_acceleration.h"
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Ref<GSAISteeringAgent> GSAIPursue::get_target() {
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return target;
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}
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void GSAIPursue::set_target(const Ref<GSAISteeringAgent> &val) {
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target = val;
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}
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float GSAIPursue::get_predict_time_max() const {
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return predict_time_max;
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}
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void GSAIPursue::set_predict_time_max(const float val) {
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predict_time_max = val;
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}
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void GSAIPursue::_calculate_steering(Ref<GSAITargetAcceleration> acceleration) {
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ERR_FAIL_COND(!target.is_valid());
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ERR_FAIL_COND(!agent.is_valid());
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Vector3 target_position = target->get_position();
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float distance_squared = (target_position - agent->get_position()).length_squared();
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float speed_squared = agent->get_linear_velocity().length_squared();
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float predict_time = predict_time_max;
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if (speed_squared > 0) {
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float predict_time_squared = distance_squared / speed_squared;
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if (predict_time_squared < predict_time_max * predict_time_max) {
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predict_time = Math::sqrt(predict_time_squared);
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}
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}
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Vector3 linear = ((target_position + (target->get_linear_velocity() * predict_time)) - agent->get_position()).normalized();
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linear *= get_modified_acceleration();
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acceleration->set_linear(linear);
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acceleration->set_angular(0);
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}
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float GSAIPursue::get_modified_acceleration() {
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return call("_get_modified_acceleration");
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}
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float GSAIPursue::_get_modified_acceleration() {
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ERR_FAIL_COND_V(!agent.is_valid(), 0);
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return agent->get_linear_acceleration_max();
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}
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GSAIPursue::GSAIPursue() {
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predict_time_max = 1.0;
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}
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GSAIPursue::~GSAIPursue() {
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}
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void GSAIPursue::_bind_methods() {
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ClassDB::bind_method(D_METHOD("get_target"), &GSAIPursue::get_target);
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ClassDB::bind_method(D_METHOD("set_target", "value"), &GSAIPursue::set_target);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "target", PROPERTY_HINT_RESOURCE_TYPE, "GSAISteeringAgent"), "set_target", "get_target");
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ClassDB::bind_method(D_METHOD("get_predict_time_max"), &GSAIPursue::get_predict_time_max);
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ClassDB::bind_method(D_METHOD("set_predict_time_max", "value"), &GSAIPursue::set_predict_time_max);
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ADD_PROPERTY(PropertyInfo(Variant::REAL, "predict_time_max"), "set_predict_time_max", "get_predict_time_max");
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BIND_VMETHOD(MethodInfo(Variant::REAL, "_get_modified_acceleration"));
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ClassDB::bind_method(D_METHOD("get_modified_acceleration"), &GSAIPursue::get_modified_acceleration);
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ClassDB::bind_method(D_METHOD("_get_modified_acceleration"), &GSAIPursue::_get_modified_acceleration);
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}
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