代码之家 › 专栏 › 技术社区 › G.L

标记的2D位置

artoolkit opengl-es android

0

G.L · 技术社区 · 7 年前

我需要获得屏幕(视图)中标记的位置,然后添加一个自定义文本视图,有可能吗?如何基于projectionMatrix和modelViewMatrix获得标记的二维位置?

 @Override
public void draw() {
    super.draw();

    GLES20.glEnable(GLES20.GL_CULL_FACE);
    GLES20.glEnable(GLES20.GL_DEPTH_TEST);
    GLES20.glFrontFace(GLES20.GL_CCW);


    boolean show = false;
    for (int trackableUID : trackableUIDs) {
        if (ARToolKit.getInstance().queryMarkerVisible(trackableUIDs.get(trackableUID))) {
            float[] projectionMatrix = ARToolKit.getInstance().getProjectionMatrix();
            float[] modelViewMatrix = ARToolKit.getInstance().queryMarkerTransformation(trackableUIDs.get(trackableUID));
            Log.i("INFOOOOO", projectionMatrix.toString());
            Log.i("INFOOOOO", modelViewMatrix.toString());
            cube.draw(projectionMatrix, modelViewMatrix);
            show = true;
        }
    }
}

1 回复 | 直到 7 年前

1

0

G.L 7 年前

@斯特纳非常感谢,我发现下面的解决方案是代码,如果有人正在寻找解决方案

            final float[] projectionMatrix = ARToolKit.getInstance().getProjectionMatrix();
            final float[] modelViewMatrix = ARToolKit.getInstance().queryMarkerTransformation(trackableUIDs.get(trackableUID));

            if (view == null) {
                view = new int[4];
                view[0] = 0;
                view[1] = 0;
                view[2] = ARTrackingActivity.width;
                view[3] = ARTrackingActivity.height;
            }

            int i = GLU.gluProject(0, 0, 0, modelViewMatrix, 0, projectionMatrix, 0, view, 0, floats, 0);
            if (i == GLES20.GL_TRUE) {
               // draw the object in screen
            }