pigine/Game.cpp

#include "Game.h"
#include "rendering/Renderer.h"
#include "utils/StringBuffer.h"
#include "utils/Utils.h"

Game::Game(Controller& c, const Clock& fps, const Clock& tps, const Size& size)
    : controller(c), fps(fps), tps(tps), size(size), physicsToggle(true),
      player(Vector2(50.0f, 50.0f), 5.0f) {
}

void Game::tick() {
    if(controller.start.wasReleased()) {
        physicsToggle = !physicsToggle;
    }
    player.preTick();
    if(physicsToggle) {
        // forces from the player
        if(controller.a.isDown() && player.onGround) {
            player.jumpTicks = 10;
            player.onGround = false;
        }
        if(controller.right.isDown()) {
            player.addForce(Vector2(2.5f, 0.0f));
        }
        if(controller.left.isDown()) {
            player.addForce(Vector2(-2.5f, 0.0f));
        }
        if(player.jumpTicks > 0) {
            player.jumpTicks--;
            player.addForce(Vector2(0.0f, 10.0f));
        }
        player.jumpTicks *= controller.a.isDown();
        // pseudo drag
        player.addForce(Vector2(-player.velocity[0] * 0.5f, 0.0f));
    } else {
        player.velocity[0] = 0.0f;
        if(controller.a.isDown() && player.onGround) {
            player.velocity[1] = 15.0f;
            player.onGround = false;
        }
        if(controller.right.isDown()) {
            player.velocity[0] = 5.0f;
        }
        if(controller.left.isDown()) {
            player.velocity[0] = -5.0f;
        }
    }
    player.tick();

    // collision detection
    // floor crush
    if(player.position[1] < 0.0f) {
        player.position[1] = 0.0f;
        player.velocity[1] = 0.0f;
        player.onGround = true;
    }
    // right wall
    if(player.position[0] + player.size[0] > size.width) {
        player.position[0] = size.width - player.size[0];
        // player.velocity[0] = 0.0f;
    }
    // left wall
    if(player.position[0] < 0.0f) {
        player.position[0] = 0.0f;
        // player.velocity[0] = 0.0f;
    }
}

void Game::render(float lag, Renderer& r) const {
    r.translateTo(0.0f, 0.0f)
        .scale(1.0f, -1.0f)
        .translateY(size.height)
        .update();
    Vector2 pos = Utils::interpolate(player.lastPosition, player.position, lag);
    r.drawRectangle(pos, player.size, Color4(0xFF, 0x00, 0x00, 0xFF));

    r.translateTo(0.0f, 0.0f).update();
    r.setStringSize(2);
    StringBuffer<100> s("FPS: ");
    s.append(fps.getUpdatesPerSecond()).append(" ");
    s.append("%6.2f", tps.getUpdatesPerSecond()).append(" ");
    s.append(physicsToggle ? "Force Physics" : "Velocity Physics");
    float y = 10.0f;
    y = r.drawString(10.0f, y, s);
    s.clear().append("a = ").append(player.acceleration);
    y = r.drawString(10.0f, y, s);
    s.clear().append("v = ").append(player.velocity);
    y = r.drawString(10.0f, y, s);
}

bool Game::isRunning() const {
    return !controller.select.isDown();
}