💿🐜 Antkeeper source code
https://antkeeper.com
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94 lines
3.1 KiB
94 lines
3.1 KiB
/*
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* Copyright (C) 2020 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "nest.hpp"
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#include "animation/ease.hpp"
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#include "math.hpp"
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nest::nest()
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{
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dig_radius = 1.25f;
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}
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float3 nest::extend_shaft(shaft& shaft)
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{
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float3 dig_position = get_shaft_position(shaft, shaft.current_depth);
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float dr = frand(dig_radius * 0.75f, dig_radius * 1.25f);
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shaft.current_depth += dr * 0.1f;
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return dig_position;
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}
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float3 nest::expand_chamber(chamber& chamber)
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{
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float dig_angle = frand(0.0f, vmq::two_pi<float>);
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float2 dig_direction = vmq::normalize(float2{std::cos(dig_angle), std::sin(dig_angle)});
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float3 chamber_center = get_shaft_position(*chamber.shaft, chamber.depth);
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float3 dig_position = chamber_center;
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float dr = frand(dig_radius * 0.75f, dig_radius * 1.25f);
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float t = frand(0.0f, 1.0f);
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dig_position.x += dig_direction.x * (chamber.outer_radius - dr) * t;
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dig_position.z += dig_direction.y * (chamber.outer_radius - dr) * t;
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return dig_position;
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}
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void nest::set_tunnel_radius(float radius)
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{
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tunnel_radius = radius;
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}
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float nest::get_shaft_angle(const shaft& shaft, float depth) const
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{
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float shaft_length = shaft.depth[1] - shaft.depth[0];
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float depth_factor = (depth - shaft.depth[0]) / shaft_length;
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float pitch = ease<float>::linear(shaft.pitch[0], shaft.pitch[1], depth_factor);
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return shaft.rotation + (depth / pitch) * shaft.chirality * vmq::two_pi<float>;
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}
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float nest::get_shaft_depth(const shaft& shaft, float turns) const
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{
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return shaft.pitch[0] * turns;
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}
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float3 nest::get_shaft_position(const shaft& shaft, float depth) const
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{
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float shaft_length = shaft.depth[1] - shaft.depth[0];
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float depth_factor = (depth - shaft.depth[0]) / shaft_length;
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float pitch = ease<float>::linear(shaft.pitch[0], shaft.pitch[1], depth_factor);
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float radius = ease<float>::out_expo(shaft.radius[0], shaft.radius[1], depth_factor);
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float translation_x = ease<float>::linear(shaft.translation[0][0], shaft.translation[1][0], depth_factor);
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float translation_z = ease<float>::linear(shaft.translation[0][1], shaft.translation[1][1], depth_factor);
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float angle = shaft.rotation + (depth / pitch) * shaft.chirality * vmq::two_pi<float>;
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float3 position;
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position[0] = std::cos(angle) * radius + translation_x;
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position[1] = -std::max<float>(shaft.depth[0], std::min<float>(shaft.depth[1], depth));
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position[2] = std::sin(angle) * radius + translation_z;
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return position;
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}
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