PlayerCharacter is moving around smoothly

2013-06-23 13:53:55 +10:00
parent 3232925ccd
commit d833b76856
7 changed files with 212 additions and 61 deletions
@@ -0,0 +1,108 @@
+/* Copyright: (c) Kayne Ruse 2013
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "player_character.hpp"
+
+void PlayerCharacter::Update(double delta) {
+	if (limitSpeed) {
+		constexpr double d = 1.0/sqrt(2);
+		position += motion * delta * d;
+	}
+	else {
+		position += motion * delta;
+	}
+	sprite.Update(delta);
+}
+
+void PlayerCharacter::MoveDirection(CardinalDirection cd) {
+	//shift the movement in this direction
+	switch(cd) {
+		case CardinalDirection::NORTH:
+			if (motion.y >= 0) {
+				motion.y -= WALKING_SPEED;
+			}
+		break;
+		case CardinalDirection::SOUTH:
+			if (motion.y <= 0) {
+				motion.y += WALKING_SPEED;
+			}
+		break;
+		case CardinalDirection::EAST:
+			if (motion.x >= 0) {
+				motion.x -= WALKING_SPEED;
+			}
+		break;
+		case CardinalDirection::WEST:
+			if (motion.x <= 0) {
+				motion.x += WALKING_SPEED;
+			}
+		break;
+	}
+	//short cut
+	if (motion.x != 0 && motion.y != 0) {
+		sprite.SetInterval(0.1);
+		limitSpeed = true;
+	}
+	else if (motion.x != 0 || motion.y != 0) {
+		sprite.SetInterval(0.1);
+		limitSpeed = false;
+	}
+	else {
+		sprite.SetInterval(0);
+		sprite.SetCurrentFrame(0);
+		limitSpeed = false;
+	}
+	//face the correct direction
+	FaceDirection();
+}
+
+void PlayerCharacter::FaceDirection(CardinalDirection cd) {
+	switch(cd) {
+		case CardinalDirection::NORTH:
+			sprite.SetCurrentStrip(1);
+		break;
+		case CardinalDirection::SOUTH:
+			sprite.SetCurrentStrip(0);
+		break;
+		case CardinalDirection::EAST:
+			sprite.SetCurrentStrip(2);
+		break;
+		case CardinalDirection::WEST:
+			sprite.SetCurrentStrip(3);
+		break;
+	}
+}
+
+void PlayerCharacter::FaceDirection() {
+	//base the direction on the character's movement
+	if (motion.y > 0) {
+		FaceDirection(CardinalDirection::SOUTH);
+	}
+	else if (motion.y < 0) {
+		FaceDirection(CardinalDirection::NORTH);
+	}
+	else if (motion.x < 0) {
+		FaceDirection(CardinalDirection::EAST);
+	}
+	else if (motion.x > 0) {
+		FaceDirection(CardinalDirection::WEST);
+	}
+}