source code

src/camera.cpp

@@ -0,0 +1,90 @@
+#include "utils.h"
+#include "camera.h"
+#include "input.h"
+#include "game.h"
+#include "world.h"
+
+#include <cmath>
+#include <algorithm>
+#include <vector>
+
+Camera::Camera()
+{
+	smoothing = true;
+	// shake_elapsed = 0;
+	shake_length = 0;
+	shake_amount = 0;
+}
+
+Camera::~Camera()
+{
+
+}
+
+Camera::Camera(int x, int y)
+{
+	this->x = x;
+	this->y = y;
+	smoothing = true;
+	// shake_elapsed = 0;
+	shake_length = 0;
+	shake_amount = 0;
+}
+
+void Camera::update(double seconds_elapsed)
+{
+	this->follow(this->character);
+
+	if (shake_length > 0)
+	{
+		int shakeX = random() * shake_amount * 2 - shake_amount;
+		int shakeY = random() * shake_amount * 2 - shake_amount;
+
+		/*int x = this->x + shakeX;
+		int y = this->y + shakeY;*/
+
+		this->x += shakeX;
+		this->y += shakeY;
+
+		shake_length--;
+
+		/*int gameMapSize = World::instance->map.width;
+		int bufferSize = Game::instance->bufferSize;
+		int margin = bufferSize / 2;
+
+		this->x = clamp(this->x, margin, gameMapSize - margin) - bufferSize / 2;
+		this->y = clamp(this->y, margin, gameMapSize - margin) - bufferSize / 2;*/
+	}
+}
+
+void Camera::follow(Character * chtr)
+{
+	int gameMapSize = World::instance->map.width;
+	int bufferSize = Game::instance->bufferSize;
+
+	int margin = bufferSize / 2;
+	int targetx = clamp(chtr->x, margin, gameMapSize - margin) - bufferSize/2;
+	int targety = clamp(chtr->y, margin, gameMapSize - margin) - bufferSize/2;
+
+	this->x = smoothing ? lerp(targetx, this->x, 0.9) : targetx;
+	this->y = smoothing ? lerp(targety, this->y, 0.9) : targety;
+}
+
+void Camera::lookAt(int x, int y, bool smooth)
+{
+	int gameMapSize = World::instance->map.width;
+	int bufferSize = Game::instance->bufferSize;
+
+	int margin = bufferSize / 2;
+	int targetx = clamp(x, margin, gameMapSize - margin) - bufferSize / 2;
+	int targety = clamp(y, margin, gameMapSize - margin) - bufferSize / 2;
+
+	this->x = smooth ? lerp(targetx, this->x, 0.9) : targetx;
+	this->y = smooth ? lerp(targety, this->y, 0.9) : targety;
+}
+
+void Camera::shake(int amount, int length)
+{
+	shake_amount = amount;
+	shake_length = length;
+}

src/camera.h

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+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "includes.h"
+#include "utils.h"
+#include "character.h"
+
+class Camera
+{
+private:
+
+	Character* character;
+
+	int shake_elapsed;
+	int shake_length;
+	int shake_amount;
+
+public:
+
+	int x;
+	int y;
+
+	bool smoothing;
+
+	Camera();
+	Camera(int x, int y);
+	~Camera();
+
+	inline void setCharacter(Character* c) { this->character = c; };
+
+	void update(double seconds_elapsed);
+	void lookAt(int x, int y, bool smooth = false);
+	void follow(Character* chtr);
+	void shake(int amount, int length);
+
+};
+
+
+#endif