103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
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#include "collectable_sim_ground.hpp"
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#include <utility>
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#include "../../../../config.h"
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void CollectableSimGround::closeAllHoles()
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{
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segments.clear();
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// Create one segment for the ground
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auto groundSegment = std::make_shared<CollectableSimGroundSegment>(world);
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groundSegment->body->createSquare(b2_kinematicBody,
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{0, -COLLECTABLES_SIM_GROUND_THICKNESS / 2.f},
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{groundWidth, COLLECTABLES_SIM_GROUND_THICKNESS});
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segments.push_back(groundSegment);
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}
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CollectableSimGround::CollectableSimGround(std::shared_ptr<b2World> world, float groundWidth)
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: world(std::move(world))
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{
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setGroundWidth(groundWidth);
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closeAllHoles();
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}
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void CollectableSimGround::setGroundWidth(float width)
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{
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if (width <= 0)
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{
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throw std::runtime_error("Ground width must be greater than 0");
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}
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if (width == groundWidth)
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{
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return;
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}
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groundWidth = width;
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updateOuterSegmentsToWidth();
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}
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void CollectableSimGround::updateOuterSegmentsToWidth()
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{
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auto outerSegments = getOuterSegments();
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auto borderPoints = groundWidth / 2.f;
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// Left segment
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if (outerSegments.left != nullptr)
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{
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auto leftSegment = outerSegments.left->body;
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auto leftCenter = leftSegment->getCenter();
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auto leftSize = leftSegment->getSize();
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auto deltaToBorder = borderPoints - abs(leftCenter.x - leftSize.x / 2.f);
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// Increase width if positive, decrease if negative
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leftSize.x += deltaToBorder;
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leftCenter.x -= deltaToBorder / 2.f;
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leftSegment->setBoxSize(leftSize);
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leftSegment->setCenter(leftCenter);
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}
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// Right segment
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if (outerSegments.right != nullptr)
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{
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auto rightSegment = outerSegments.right->body;
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auto rightCenter = rightSegment->getCenter();
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auto rightSize = rightSegment->getSize();
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auto deltaToBorder = borderPoints - abs(rightCenter.x + rightSize.x / 2.f);
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// Increase width if positive, decrease if negative
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rightSize.x += deltaToBorder;
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rightCenter.x += deltaToBorder / 2.f;
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rightSegment->setBoxSize(rightSize);
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rightSegment->setCenter(rightCenter);
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}
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}
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CollectableSimGround::SideSegments CollectableSimGround::getOuterSegments(int holeId)
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{
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SideSegments sideSegments;
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for (const auto &segment: segments)
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{
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// If valid holeId, match left hole id
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// If invalid holeId, get outer segment
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if ((segment->leftHoleId == holeId && holeId >= 0)
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|| (segment->rightHoleId < 0 && holeId < 0))
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{
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sideSegments.right = segment;
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}
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if ((segment->rightHoleId == holeId && holeId >= 0)
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|| (segment->leftHoleId < 0 && holeId < 0))
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{
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sideSegments.left = segment;
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}
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}
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return sideSegments;
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}
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