2014/10/15 下午 10:12:27

iphone Programming Glossary: p4

http://stackoverflow.com/questions/13719143/draw-graph-curves-with-uibezierpath

curve then you can roughly draw a curve to follow them. If you do the following... OK say you have 5 points. p1 p2 p3 p4 and p5. You need to work out the midpoint between each pair of points. m1 midpoint of p1 and p2 and so on ... So you have.. m2 with p2 as a control point. Add quad curve to point m3 with p3 as a control point. Add quad curve to point m4 with p4 as a control point. and so on... This will get you all apart from the ends of the curve can't remember how to get them at..

Core Data cannot resolve faults when object has “description” attribute?

http://stackoverflow.com/questions/2169252/core-data-cannot-resolve-faults-when-object-has-description-attribute

01 30 14 47 14.433 app 22618 20b B 0xf7f750 entity B id 0xf7ba70 x coredata B01FEC86 14D6 4973 BFDB EDE4AFD24FDC B p4 data fault 2010 01 30 14 47 14.438 app 22618 20b A 0xf7e360 entity A id 0xf35820 x coredata B01FEC86 14D6 4973 BFDB EDE4AFD24FDC..

iPhone image stretching (skew)

http://stackoverflow.com/questions/2351586/iphone-image-stretching-skew

image stretching skew How do I skew an image For example each corner has a CGPoint with coords p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted... skew How do I skew an image For example each corner has a CGPoint with coords p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted. I tried to use.. skew How do I skew an image For example each corner has a CGPoint with coords p1 p2 p3 p4. Then I need to set p4.x 50 p4.y 30. So this corner p4 should be stretched in a 2D perspective and the image should be distorted. I tried to use CATransform3D..

Find a point, a given distance, along a simple cubic bezier curve. (On an iPhone!)

http://stackoverflow.com/questions/4058979/find-a-point-a-given-distance-along-a-simple-cubic-bezier-curve-on-an-iphone

3 a a t t 3 b t 6 b b 3 t t c 3 c 3 t t2 d t3 @implementation MBBezierView void drawRect CGRect rect CGPoint p1 p2 p3 p4 p1 CGPointMake 30 rect.size.height 0.33 p2 CGPointMake CGRectGetMidX rect CGRectGetMinY rect p3 CGPointMake CGRectGetMidX.. 0.33 p2 CGPointMake CGRectGetMidX rect CGRectGetMinY rect p3 CGPointMake CGRectGetMidX rect CGRectGetMaxY rect p4 CGPointMake 30 CGRectGetMaxX rect rect.size.height 0.66 UIColor blackColor set UIBezierPath bezierPathWithRect rect fill.. UIBezierPath bezierPath UIBezierPath alloc init autorelease bezierPath moveToPoint p1 bezierPath addCurveToPoint p4 controlPoint1 p2 controlPoint2 p3 bezierPath stroke UIColor brownColor setStroke for CGFloat t 0.0 t 1.00001 t 0.05 CGPoint..

Find the tangent of a point on a cubic bezier curve (on an iPhone)

http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone

coefficients return C1 t t t C2 t t C3 t C4 @implementation MBBezierView void drawRect CGRect rect CGPoint p1 p2 p3 p4 p1 CGPointMake 30 rect.size.height 0.33 p2 CGPointMake CGRectGetMidX rect CGRectGetMinY rect p3 CGPointMake CGRectGetMidX.. 0.33 p2 CGPointMake CGRectGetMidX rect CGRectGetMinY rect p3 CGPointMake CGRectGetMidX rect CGRectGetMaxY rect p4 CGPointMake 30 CGRectGetMaxX rect rect.size.height 0.66 UIColor blackColor set UIBezierPath bezierPathWithRect rect fill.. UIBezierPath bezierPath UIBezierPath alloc init autorelease bezierPath moveToPoint p1 bezierPath addCurveToPoint p4 controlPoint1 p2 controlPoint2 p3 bezierPath stroke UIColor brownColor setStroke now mark in points along the bezier for..