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World: Re-use RectangleShapes for rendering

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sf::RectangleShapes were created brand new each frame, which takes a lot of time.
Instead, keep an array of them available and update them instead of creating new ones.

This also allows a nice optimization of only updating them if needed, by checking their
previous value.

Update the available number of rects when the window resizes.
This commit is contained in:
trotFunky 2024-01-29 00:25:57 +00:00
parent c875adfcbb
commit 10d0dee35d
3 changed files with 23 additions and 8 deletions
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22
World.cpp
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@ -27,6 +27,12 @@ int World::getH() const
return h;
}
void World::resizeWindow(const sf::FloatRect& resizedView) {
sf::RectangleShape defaultRectangle(sf::Vector2f(1,2));
defaultRectangle.setFillColor(Colors::Wall);
renderColumns.resize(static_cast<long>(resizedView.width), defaultRectangle);
}
BlockType World::getBlock(int x, int y) const
{
return map[x + w*y];
@ -212,18 +218,22 @@ float World::castRay(float originX, float originY, float orientation) const
}
void World::fillColumn(sf::RenderWindow& window, unsigned int column,
float scale, sf::Color fillColor) const
float scale, sf::Color fillColor)
{
float columnHeight = static_cast<float>(window.getSize().y)*scale;
sf::RectangleShape pixelColumn(sf::Vector2f(1,columnHeight));
pixelColumn.setPosition(static_cast<float>(column),
(static_cast<float>(window.getSize().y)-columnHeight)/2.0f);
pixelColumn.setFillColor(fillColor);
sf::RectangleShape& pixelColumn = renderColumns[column];
if (pixelColumn.getSize().y != columnHeight) {
pixelColumn.setSize({1, columnHeight});
pixelColumn.setPosition(static_cast<float>(column),
(static_cast<float>(window.getSize().y) - columnHeight) / 2.0f);
}
if (pixelColumn.getFillColor() != fillColor)
pixelColumn.setFillColor(fillColor);
window.draw(pixelColumn);
}
void World::render(sf::RenderWindow& window) const
void World::render(sf::RenderWindow& window)
{
float windowX = static_cast<float>(window.getSize().x);
float windowY = static_cast<float>(window.getSize().y);