本文整理汇总了Java中org.andengine.util.math.MathUtils.length方法的典型用法代码示例。如果您正苦于以下问题：Java MathUtils.length方法的具体用法？Java MathUtils.length怎么用？Java MathUtils.length使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.andengine.util.math.MathUtils的用法示例。
在下文中一共展示了MathUtils.length方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: onUpdateColor
import org.andengine.util.math.MathUtils; //导入方法依赖的package包/类
@Override
public void onUpdateColor(final Gradient pGradient) {
final float[] bufferData = this.mBufferData;
final float gradientVectorX = pGradient.getGradientVectorX();
final float gradientVectorY = pGradient.getGradientVectorY();
final float length = MathUtils.length(gradientVectorX, gradientVectorY);
if (length == 0) {
return;
}
float dX = gradientVectorX / length;
float dY = gradientVectorY / length;
final float c = MathConstants.SQRT_2;
final float c2 = 2 * c;
if (pGradient.isGradientFitToBounds()) {
final float tmp = 1 / (Math.abs(dX) + Math.abs(dY));
dX *= tmp * c;
dY *= tmp * c;
}
final float fromRed = pGradient.getFromRed();
final float fromGreen = pGradient.getFromGreen();
final float fromBlue = pGradient.getFromBlue();
final float fromAlpha = pGradient.getFromAlpha(); // TODO * 'this.mOverallOpactity'
final float toRed = pGradient.getToRed();
final float toGreen = pGradient.getToGreen();
final float toBlue = pGradient.getToBlue();
final float toAlpha = pGradient.getToAlpha(); // TODO * 'this.mOverallOpactity'
/* Pre-fetch some calculations. */
final float dRed = fromRed - toRed;
final float dGreen = fromGreen - toGreen;
final float dBlue = fromBlue - toBlue;
final float dAlpha = fromAlpha - toAlpha;
final float v0 = (c + dX + dY) / c2;
bufferData[(0 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX] = ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v0), toGreen + (dGreen * v0), toBlue + (dBlue * v0), toAlpha + (dAlpha * v0));
final float v1 = (c + dX - dY) / c2;
bufferData[(1 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX] = ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v1), toGreen + (dGreen * v1), toBlue + (dBlue * v1), toAlpha + (dAlpha * v1));
final float v2 = (c - dX + dY) / c2;
bufferData[(2 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX] = ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v2), toGreen + (dGreen * v2), toBlue + (dBlue * v2), toAlpha + (dAlpha * v2));
final float v3 = (c - dX - dY) / c2;
bufferData[(3 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX] = ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v3), toGreen + (dGreen * v3), toBlue + (dBlue * v3), toAlpha + (dAlpha * v3));
this.setDirtyOnHardware();
}
示例2: onUpdateColor
import org.andengine.util.math.MathUtils; //导入方法依赖的package包/类
@Override
public void onUpdateColor(final Gradient pGradient) {
final FloatBuffer bufferData = this.mFloatBuffer;
final float gradientVectorX = pGradient.getGradientVectorX();
final float gradientVectorY = pGradient.getGradientVectorY();
final float length = MathUtils.length(gradientVectorX, gradientVectorY);
if (length == 0) {
return;
}
float dX = gradientVectorX / length;
float dY = gradientVectorY / length;
final float c = MathConstants.SQRT_2;
final float c2 = 2 * c;
if (pGradient.isGradientFitToBounds()) {
final float tmp = 1 / (Math.abs(dX) + Math.abs(dY));
dX *= tmp * c;
dY *= tmp * c;
}
final float fromRed = pGradient.getFromRed();
final float fromGreen = pGradient.getFromGreen();
final float fromBlue = pGradient.getFromBlue();
final float fromAlpha = pGradient.getFromAlpha(); // TODO * 'this.mOverallOpactity'
final float toRed = pGradient.getToRed();
final float toGreen = pGradient.getToGreen();
final float toBlue = pGradient.getToBlue();
final float toAlpha = pGradient.getToAlpha(); // TODO * 'this.mOverallOpactity'
/* Pre-fetch some calculations. */
final float dRed = fromRed - toRed;
final float dGreen = fromGreen - toGreen;
final float dBlue = fromBlue - toBlue;
final float dAlpha = fromAlpha - toAlpha;
final float v0 = (c + dX + dY) / c2;
bufferData.put((0 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX, ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v0), toGreen + (dGreen * v0), toBlue + (dBlue * v0), toAlpha + (dAlpha * v0)));
final float v1 = (c + dX - dY) / c2;
bufferData.put((1 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX, ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v1), toGreen + (dGreen * v1), toBlue + (dBlue * v1), toAlpha + (dAlpha * v1)));
final float v2 = (c - dX + dY) / c2;
bufferData.put((2 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX, ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v2), toGreen + (dGreen * v2), toBlue + (dBlue * v2), toAlpha + (dAlpha * v2)));
final float v3 = (c - dX - dY) / c2;
bufferData.put((3 * Gradient.VERTEX_SIZE) + Gradient.COLOR_INDEX, ColorUtils.convertRGBAToABGRPackedFloat(toRed + (dRed * v3), toGreen + (dGreen * v3), toBlue + (dBlue * v3), toAlpha + (dAlpha * v3)));
this.setDirtyOnHardware();
}