AnimateVars - Syntax Rewritten and Cleanup

- Moved 2 longer functions to a file called animation_helper.
- Snake_Case and removal of useless comments.

Update Makefile.am

Author: jetrotal

CMakeLists.txt

@@ -36,6 +36,8 @@ add_library(${PROJECT_NAME} OBJECT
 	src/async_op.h
 	src/algo.h
 	src/algo.cpp
+	src/animation_helper.cpp
+	src/animation_helper.h
 	src/attribute.h
 	src/attribute.cpp
 	src/audio.cpp

Makefile.am

@@ -14,6 +14,8 @@ libeasyrpg_player_a_SOURCES = \
 	src/async_op.h \
 	src/algo.h \
 	src/algo.cpp \
+	src/animation_helper.cpp \
+	src/animation_helper.h \
 	src/attribute.h \
 	src/attribute.cpp \
 	src/audio.cpp \

src/animation_helper.cpp

@@ -0,0 +1,161 @@
+#include "animation_helper.h"
+#include <cmath>
+#include <vector>
+#include <sstream>
+
+
+// references for cubic bezier:
+// https://matthewlein.com/tools/ceaser
+// https://cubic-bezier.com/
+double Animation_Helper::CubicBezier(float t, const double& p0, const double& p1, const double& p2, const double& p3) {
+
+	float u = 1 - t;
+	float tt = t * t;
+	float uu = u * u;
+	float uuu = uu * u;
+	float ttt = tt * t;
+
+	//Point2d p = {0,0};
+	//p.x = uuu * 0 + 3 * uu * t * p0 + 3 * u * tt * p2 + ttt * 1;
+	return uuu * 0 + 3 * uu * t * p1 + 3 * u * tt * p3 + ttt * 1;
+
+	//return p.y;
+}
+
+double Animation_Helper::GetEasedTime(const std::string& easing_type, double t, double b, double c, double d) {
+	if (easing_type == "linear")  return Animation_Helper::CubicBezier(t, 0.250, 0.250, 0.750, 0.750);
+
+	else if (easing_type == "ease")  return Animation_Helper::CubicBezier(t, 0.250, 0.100, 0.250, 1.000);
+	else if (easing_type == "easeIn")  return Animation_Helper::CubicBezier(t, 0.420, 0.000, 1.000, 1.000);
+	else if (easing_type == "easeOut")  return Animation_Helper::CubicBezier(t, 0.000, 0.000, 0.580, 1.000);
+	else if (easing_type == "easeInOut")  return Animation_Helper::CubicBezier(t, 0.420, 0.000, 0.580, 1.000);
+
+	else if (easing_type == "quadIn")  return Animation_Helper::CubicBezier(t, 0.550, 0.085, 0.680, 0.530);
+	else if (easing_type == "quadOut")  return Animation_Helper::CubicBezier(t, 0.250, 0.460, 0.450, 0.940);
+	else if (easing_type == "quadInOut")  return Animation_Helper::CubicBezier(t, 0.455, 0.030, 0.515, 0.955);
+
+	else if (easing_type == "cubicIn")  return Animation_Helper::CubicBezier(t, 0.550, 0.055, 0.675, 0.190);
+	else if (easing_type == "cubicOut")  return Animation_Helper::CubicBezier(t, 0.215, 0.610, 0.355, 1.000);
+	else if (easing_type == "cubicInOut")  return Animation_Helper::CubicBezier(t, 0.645, 0.045, 0.355, 1.000);
+
+	else if (easing_type == "quartIn")  return Animation_Helper::CubicBezier(t, 0.895, 0.030, 0.685, 0.220);
+	else if (easing_type == "quartOut")  return Animation_Helper::CubicBezier(t, 0.165, 0.840, 0.440, 1.000);
+	else if (easing_type == "quartInOut")  return Animation_Helper::CubicBezier(t, 0.770, 0.000, 0.175, 1.000);
+
+	else if (easing_type == "quintIn")  return Animation_Helper::CubicBezier(t, 0.755, 0.050, 0.855, 0.060);
+	else if (easing_type == "quintOut")  return Animation_Helper::CubicBezier(t, 0.230, 1.000, 0.320, 1.000);
+	else if (easing_type == "quintInOut")  return Animation_Helper::CubicBezier(t, 0.860, 0.000, 0.070, 1.000);
+
+	else if (easing_type == "sineIn")  return Animation_Helper::CubicBezier(t, 0.470, 0.000, 0.745, 0.715);
+	else if (easing_type == "sineOut")  return Animation_Helper::CubicBezier(t, 0.390, 0.575, 0.565, 1.000);
+	else if (easing_type == "sineInOut")  return Animation_Helper::CubicBezier(t, 0.445, 0.050, 0.550, 0.950);
+
+	else if (easing_type == "ExpoIn")  return Animation_Helper::CubicBezier(t, 0.950, 0.050, 0.795, 0.035);
+	else if (easing_type == "expoOut")  return Animation_Helper::CubicBezier(t, 0.190, 1.000, 0.220, 1.000);
+	else if (easing_type == "expoInOut")  return Animation_Helper::CubicBezier(t, 1.000, 0.000, 0.000, 1.000);
+
+	else if (easing_type == "circIn")  return Animation_Helper::CubicBezier(t, 0.600, 0.040, 0.980, 0.335);
+	else if (easing_type == "circOut")  return Animation_Helper::CubicBezier(t, 0.075, 0.820, 0.165, 1.000);
+	else if (easing_type == "circInOut")  return Animation_Helper::CubicBezier(t, 0.785, 0.135, 0.150, 0.860);
+
+	else if (easing_type == "backIn")  return Animation_Helper::CubicBezier(t, 0.600, -0.280, 0.735, 0.045);
+	else if (easing_type == "backOut")  return Animation_Helper::CubicBezier(t, 0.175, 0.885, 0.320, 1.275);
+	else if (easing_type == "backInOut")  return Animation_Helper::CubicBezier(t, 0.680, -0.550, 0.265, 1.550);
+
+	else if (easing_type == "elasticIn") {
+		if (t == 0) {
+			return b;
+		}
+		if ((t /= d) == 1) {
+			return b + c;
+		}
+
+		double p = d * 0.3;
+		double a = c;
+		double s = p / 4;
+
+		double post_increment_fix = a * pow(2, 10 * (t -= 1));
+		return -(post_increment_fix * sin((t * d - s) * (2 * M_PI) / p)) + b;
+	}
+	else if (easing_type == "elasticOut") {
+		if (t == 0) {
+			return b;
+		}
+		if ((t /= d) == 1) {
+			return b + c;
+		}
+
+		double p = d * 0.3;
+		double a = c;
+		double s = p / 4;
+
+		return (a * pow(2, -10 * t) * sin((t * d - s) * (2 * M_PI) / p) + c + b);
+	}
+	else if (easing_type == "elasticInOut") {
+		if (t == 0) {
+			return b;
+		}
+		if ((t /= d / 2) == 2) {
+			return b + c;
+		}
+
+		double p = d * (0.3 * 1.5);
+		double a = c;
+		double s = p / 4;
+
+		if (t < 1) {
+			double post_increment_fix = a * pow(2, 10 * (t -= 1));
+			return -0.5 * (post_increment_fix * sin((t * d - s) * (2 * M_PI) / p)) + b;
+		}
+
+		double post_increment_fix = a * pow(2, -10 * (t -= 1));
+		return post_increment_fix * sin((t * d - s) * (2 * M_PI) / p) * 0.5 + c + b;
+	}
+
+	else if (easing_type == "bounceIn") {
+		return c - Animation_Helper::GetEasedTime("bounceOut", d - t, 0, c, d) + b;
+	}
+	else if (easing_type == "bounceOut") {
+		if ((t /= d) < (1 / 2.75)) {
+			return c * (7.5625 * t * t) + b;
+		}
+		else if (t < (2 / 2.75)) {
+			t -= (1.5 / 2.75);
+			return c * (7.5625 * t * t + 0.75) + b;
+		}
+		else if (t < (2.5 / 2.75)) {
+			t -= (2.25 / 2.75);
+			return c * (7.5625 * t * t + 0.9375) + b;
+		}
+		else {
+			t -= (2.625 / 2.75);
+			return c * (7.5625 * t * t + 0.984375) + b;
+		}
+	}
+	else if (easing_type == "bounceInOut") {
+		if (t < d / 2) {
+			return Animation_Helper::GetEasedTime("bounceIn", t * 2, 0, c, d) * 0.5 + b;
+		}
+		else {
+			return Animation_Helper::GetEasedTime("bounceOut", t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b;
+		}
+	}
+
+	if (easing_type.substr(0, 6) == "bezier") {
+		std::vector<double> bezier_params;
+
+		size_t start_pos = easing_type.find("(") + 1;
+		size_t end_pos = easing_type.find(")");
+		std::string value_string = easing_type.substr(start_pos, end_pos - start_pos);
+
+		std::istringstream iss(value_string);
+		double value;
+
+		while (iss >> value) bezier_params.push_back(value), iss.ignore();
+
+		if (bezier_params.size() == 4)
+			return Animation_Helper::CubicBezier(t, bezier_params[0], bezier_params[1], bezier_params[2], bezier_params[3]);
+	}
+
+	return c * t / d + b; // Default to linear easing if the easing type is not recognized
+}

src/animation_helper.h

@@ -0,0 +1,11 @@
+#ifndef ANIMATION_HELPER_H
+#define ANIMATION_HELPER_H
+
+#include <string>
+
+namespace Animation_Helper {
+	double CubicBezier(float t, const double& p0, const double& p1, const double& p2, const double& p3);
+	double GetEasedTime(const std::string& easing_type, double t, double b, double c, double d);
+}
+
+#endif