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资源说明：Objective C example on how to make a 3D effect using matrix multiplication
== MatrixMath
This app is an example of how to produce a 3D effect using simple math.
== How does it work?
In the core of this example is the following function:
- (void) transform:(NSArray *)pts yrt:(CGFloat)yrt zrt:(CGFloat)zrt {
if (pts==nil) return;
CGFloat c1, s1, c2, s2;
c1 = (CGFloat) cos(zrt);
s1 = (CGFloat) sin(zrt);
c2 = (CGFloat) cos(yrt);
s2 = (CGFloat) sin(yrt);
for (Point3D *p in pts) {
float x = p.x * c1 * c2 - p.y * s2 - p.z * c2 * s1;
float y = p.x * c1 * s2 + p.y * c2 - p.z * s1 * s2;
float z = p.x * s1 + 0 + p.z * c1;
p.x = x;
p.y = y;
p.z = z;
}
}
It accepts a list of 3D points, Y rotation delta and Z rotation delta. It then transforms all of the points based on the rotation deltas.
To display the points, use the x and z coordinates.
== How to test this example?
Download the code and run it. Drag your finger on the screen and see what you get.
本源码包内暂不包含可直接显示的源代码文件，请下载源码包。
