90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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Copyright 2016, 2017 Michele "King_DuckZ" Santullo
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This file is part of MyCurry.
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MyCurry 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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MyCurry 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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You should have received a copy of the GNU General Public License
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along with MyCurry. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "worldviewport.hpp"
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#include "worldgrid.hpp"
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#include "compatibility.h"
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#include <cassert>
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#include <algorithm>
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namespace curry {
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namespace {
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vec2us starting_index (const WorldViewport& parViewport) a_pure;
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vec2us starting_index (const WorldViewport& parViewport) {
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const auto pos = vector_cast<vec2i>(parViewport.position());
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const auto ts = parViewport.world()->tile_size();
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return vec2us(
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static_cast<uint16_t>(std::max(0, pos.x()) / ts.x()),
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static_cast<uint16_t>(std::max(0, pos.y()) / ts.y())
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);
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}
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} //unnamed namespace
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WorldViewport::WorldViewport (WorldGrid* parWorld, vec2f parSize, const WorldSizeNotifiable::DeferredRegister& parDeferredRegister) :
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WorldSizeNotifiable(parDeferredRegister),
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m_position(vec2f(0.0f), vec2f(0.0f), vec2f(0.0f)),
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m_size(parSize),
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m_world(parWorld)
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{
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assert(m_world);
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m_position.set(vec2f(0.0f));
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}
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const WorldGrid* WorldViewport::world() const {
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return m_world;
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}
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const vec2f& WorldViewport::position() const {
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return m_position.get();
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}
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const vec2f& WorldViewport::size() const {
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return m_size;
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}
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auto WorldViewport::begin() -> iterator {
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return iterator(this, false);
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}
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auto WorldViewport::end() -> iterator {
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return iterator(this, true);
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}
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void WorldViewport::set_position (const vec2f& parPos) {
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m_position.set(parPos);
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}
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void WorldViewport::world_size_changed (const vec2us&, const vec2i& parPixelSize) {
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m_position.change_minmax(vec2f(0.0f), vector_cast<vec2f>(parPixelSize) - m_size);
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}
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const TileIndex* WorldViewport::tile (const vec2us& parIndex) const {
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return world()->tile(parIndex + starting_index(*this));
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}
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void WorldViewport::allow_overscan (bool parAllow) {
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if (parAllow) {
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m_position.change_minmax(-size(), vector_cast<vec2f>(world_size_pixel(*m_world)));
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}
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else {
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m_position.change_minmax(vec2f(0.0f), vector_cast<vec2f>(world_size_pixel(*m_world)) - size());
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}
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}
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} //namespace curry
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