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Merge pull request #501 from vlidholt/master

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Adds perspective projection to Node3D in sprites
This commit is contained in:
Viktor Lidholt 2015-08-07 12:56:04 -07:00
commit 45a83d565d
1 changed files with 15 additions and 2 deletions
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17
packages/flutter/example/game/lib/node3d.dart
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@ -20,12 +20,25 @@ class Node3D extends Node {
invalidateTransformMatrix();
}
double _projectionDepth = 500.0;
double get projectionDepth => _projectionDepth;
set projectionDepth(double projectionDepth) {
_projectionDepth = projectionDepth;
invalidateTransformMatrix();
}
Matrix4 computeTransformMatrix() {
// Apply normal 2d transforms
Matrix4 matrix = super.computeTransformMatrix();
matrix.translate(0.0, 0.0, 500.0);
// Apply perspective projection
Matrix4 projection = new Matrix4(1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, -1.0/_projectionDepth,
0.0, 0.0, 0.0, 1.0);
matrix = matrix.multiply(projection);
// Rotate around x and y axis
matrix.rotateY(radians(_rotationY));