opsu-dance/src/itdelatrisu/opsu/objects/curves/Curve.java

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/*
* opsu! - an open-source osu! client
* Copyright (C) 2014, 2015 Jeffrey Han
*
* opsu! is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* opsu! is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with opsu!. If not, see <http://www.gnu.org/licenses/>.
*/
package itdelatrisu.opsu.objects.curves;
import itdelatrisu.opsu.GameImage;
import itdelatrisu.opsu.Options;
import itdelatrisu.opsu.Utils;
import itdelatrisu.opsu.beatmap.HitObject;
import itdelatrisu.opsu.render.CurveRenderState;
import itdelatrisu.opsu.skins.Skin;
import org.lwjgl.opengl.ContextCapabilities;
import org.lwjgl.opengl.GLContext;
import org.newdawn.slick.Color;
import org.newdawn.slick.Image;
import org.newdawn.slick.util.Log;
/**
* Representation of a curve.
*
* @author fluddokt (https://github.com/fluddokt)
*/
public abstract class Curve {
/** Points generated along the curve should be spaced this far apart. */
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protected static float CURVE_POINTS_SEPERATION = 5;
/** The curve border color. */
private static Color borderColor;
/** Whether mmsliders are supported. */
private static boolean mmsliderSupported = false;
/** The associated HitObject. */
protected HitObject hitObject;
/** The scaled starting x, y coordinates. */
protected float x, y;
/** The scaled slider x, y coordinate lists. */
protected float[] sliderX, sliderY;
/** Per-curve render-state used for the new style curve renders. */
private CurveRenderState renderState;
/** Points along the curve (set by inherited classes). */
protected Vec2f[] curve;
/**
* Constructor.
* @param hitObject the associated HitObject
* @param color the color of this curve
*/
protected Curve(HitObject hitObject, Color color) {
this.hitObject = hitObject;
this.x = hitObject.getScaledX();
this.y = hitObject.getScaledY();
this.sliderX = hitObject.getScaledSliderX();
this.sliderY = hitObject.getScaledSliderY();
this.renderState = null;
}
/**
* Set the width and height of the container that Curves get drawn into.
* Should be called before any curves are drawn.
* @param width the container width
* @param height the container height
* @param circleSize the circle size
* @param borderColor the curve border color
*/
public static void init(int width, int height, float circleSize, Color borderColor) {
Curve.borderColor = borderColor;
ContextCapabilities capabilities = GLContext.getCapabilities();
mmsliderSupported = capabilities.GL_EXT_framebuffer_object && capabilities.OpenGL30;
if (mmsliderSupported)
CurveRenderState.init(width, height, circleSize);
else {
if (Options.getSkin().getSliderStyle() != Skin.STYLE_PEPPYSLIDER)
Log.warn("New slider style requires FBO support and OpenGL 3.2.");
}
}
/**
* Returns the point on the curve at a value t.
* @param t the t value [0, 1]
* @return the point [x, y]
*/
public abstract float[] pointAt(float t);
/**
* Draws the full curve to the graphics context.
* @param color the color filter
*/
public void draw(Color color) {
if (curve == null)
return;
// peppysliders
if (Options.getSkin().getSliderStyle() == Skin.STYLE_PEPPYSLIDER || !mmsliderSupported) {
Image hitCircle = GameImage.HITCIRCLE.getImage();
Image hitCircleOverlay = GameImage.HITCIRCLE_OVERLAY.getImage();
for (int i = 0; i < curve.length; i++)
hitCircleOverlay.drawCentered(curve[i].x, curve[i].y, Utils.COLOR_WHITE_FADE);
for (int i = 0; i < curve.length; i++)
hitCircle.drawCentered(curve[i].x, curve[i].y, color);
}
// mmsliders
else {
if (renderState == null)
renderState = new CurveRenderState(hitObject);
renderState.draw(color, borderColor, curve);
}
}
/**
* Returns the angle of the first control point.
*/
public abstract float getEndAngle();
/**
* Returns the angle of the last control point.
*/
public abstract float getStartAngle();
/**
* Returns the scaled x coordinate of the control point at index i.
* @param i the control point index
*/
public float getX(int i) { return (i == 0) ? x : sliderX[i - 1]; }
/**
* Returns the scaled y coordinate of the control point at index i.
* @param i the control point index
*/
public float getY(int i) { return (i == 0) ? y : sliderY[i - 1]; }
/**
* Linear interpolation of a and b at t.
*/
protected float lerp(float a, float b, float t) {
return a * (1 - t) + b * t;
}
/**
* Discards the slider cache (only used for mmsliders).
*/
public void discardCache() {
if (renderState != null)
renderState.discardCache();
}
}