| commit | 8e505ae596d0ab8ed2967c59857967a317f9fc1b | [log] [tgz] |
|---|---|---|
| author | John McCutchan <john@johnmccutchan.com> | Tue Feb 19 08:01:23 2013 -0800 |
| committer | John McCutchan <john@johnmccutchan.com> | Tue Feb 19 08:01:23 2013 -0800 |
| tree | ccde9e46d17c43d6bfc68281fd8b502ac00d7c00 | |
| parent | a217879a1556103c5fff049599b43997c7194a2f [diff] | |
| parent | 3866bd0ec75dc706c3a4b248798e44d30f984776 [diff] |
Merge pull request #46 from fkleon/dynamic_constructors Vec3+4 constructors fail on vector/scalar combinations
==============
A Vector math library for 2D and 3D applications.
position.xwz = color.grb;.new vec3(new vec2(x,y), z);.1. Add the following to your project's pubspec.yaml and run pub install.
dependencies:
vector_math:
git: https://github.com/johnmccutchan/DartVectorMath.git
2. Add the correct import for your project.
import 'package:vector_math/vector_math.dart';
1. Using the GLSL getter and setter syntax.
void main() {
vec3 x = new vec3(); // Zero vector
vec4 y = new vec4(4.0); // Vector with 4.0 in all lanes
x.zyx = y.xzz; // Sets z,y,x the values in x,z,z
}
2. Transforming a vector.
void main() {
// Rotation of pi/2 degrees around the Y axis followed by a
// translation of (5.0, 2.0, 3.0).
mat4 T = new mat4.rotationY(pi*0.5).translate(5.0, 2.0, 3.0);
// A point.
vec3 position = new vec3.raw(1.0, 1.0, 1.0);
// Transform position by T.
T.transform3(position);
}
3. Invert a matrix
void main() {
// Rotation of 90 degrees around the Y axis followed by a
// translation of (5.0, 2.0, 3.0).
mat4 T = new mat4.rotationY(pi*0.5).translate(5.0, 2.0, 3.0);
// Invert T.
T.invert();
// Invert just the rotation in T.
T.invertRotation();
}
4. Rotate a vector using a quaternion
void main() {
// The X axis.
vec3 axis = new vec3.raw(1.0, 0.0, 0.0);
// 90 degrees.
double angle = pi/2.0;
// Quaternion encoding a 90 degree rotation along the X axis.
quat q = new quat.axisAngle(axis, angle);
// A point.
vec3 point = new vec3.raw(1.0, 1.0, 1.0);
// Rotate point by q.
q.rotate(point);
}