ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Test the image layer renderer's transform matrix

Browse Source
This commit is contained in:
Éric Lemoine
2013-02-15 23:17:30 +01:00
parent 85eec4e9b8
commit be6c1a1a27
2 changed files with 123 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
src/ol/renderer/webgl/webglimagelayerrenderer.js
View File

@@ -1,6 +1,8 @@
goog.provide('ol.renderer.webgl.ImageLayer');
goog.require('goog.vec.Mat4');
goog.require('ol.Coordinate');
goog.require('ol.Extent');
goog.require('ol.Image');
goog.require('ol.ImageState');
goog.require('ol.ViewHint');
@@ -183,23 +185,8 @@ ol.renderer.webgl.ImageLayer.prototype.renderFrame =
var canvas = this.getMapRenderer().getCanvas();
var canvasExtentWidth = canvas.width * viewResolution;
var canvasExtentHeight = canvas.height * viewResolution;
var imageExtent = image.getExtent();
var vertexCoordMatrix = this.vertexCoordMatrix_;
goog.vec.Mat4.makeIdentity(vertexCoordMatrix);
goog.vec.Mat4.scale(vertexCoordMatrix,
2 / canvasExtentWidth, 2 / canvasExtentHeight, 1);
goog.vec.Mat4.rotateZ(vertexCoordMatrix, -viewRotation);
goog.vec.Mat4.translate(vertexCoordMatrix,
imageExtent.minX - viewCenter.x,
imageExtent.minY - viewCenter.y,
0);
goog.vec.Mat4.scale(vertexCoordMatrix,
imageExtent.getWidth() / 2, imageExtent.getHeight() / 2, 1);
goog.vec.Mat4.translate(vertexCoordMatrix, 1, 1, 0);
this.updateVertexCoordMatrix_(canvas.width, canvas.height,
viewCenter, viewResolution, viewRotation, image.getExtent());
// Translate and scale to flip the Y coord.
var texCoordMatrix = this.texCoordMatrix_;
@@ -211,3 +198,35 @@ ol.renderer.webgl.ImageLayer.prototype.renderFrame =
this.texture_ = texture;
}
};
/**
* @private
* @param {number} canvasWidth Canvas width.
* @param {number} canvasHeight Canvas height.
* @param {ol.Coordinate} viewCenter View center.
* @param {number} viewResolution View resolution.
* @param {number} viewRotation View rotation.
* @param {ol.Extent} imageExtent Image extent.
*/
ol.renderer.webgl.ImageLayer.prototype.updateVertexCoordMatrix_ =
function(canvasWidth, canvasHeight, viewCenter,
viewResolution, viewRotation, imageExtent) {
var canvasExtentWidth = canvasWidth * viewResolution;
var canvasExtentHeight = canvasHeight * viewResolution;
var vertexCoordMatrix = this.vertexCoordMatrix_;
goog.vec.Mat4.makeIdentity(vertexCoordMatrix);
goog.vec.Mat4.scale(vertexCoordMatrix,
2 / canvasExtentWidth, 2 / canvasExtentHeight, 1);
goog.vec.Mat4.rotateZ(vertexCoordMatrix, -viewRotation);
goog.vec.Mat4.translate(vertexCoordMatrix,
imageExtent.minX - viewCenter.x,
imageExtent.minY - viewCenter.y,
0);
goog.vec.Mat4.scale(vertexCoordMatrix,
imageExtent.getWidth() / 2, imageExtent.getHeight() / 2, 1);
goog.vec.Mat4.translate(vertexCoordMatrix, 1, 1, 0);
};