Libgdx NESTED ShapeRenderer not drawing lines

问题

In the code below I retrieve an arraylist of vertices (I've debugged and they are in fact there) and then attempt to render them in this nest loop arrangement which is hosted in the render method. For some reason, the ShapeRenderer cannot connect all the lines if this is nested? Can someone tell me what I'm doing wrong? Nothing is being drawn to the screen; I get no errors.

    shapeRenderer.setProjectionMatrix(camera.combined);
    shapeRenderer.begin(ShapeType.Line);
    for(int i = 0;i<tmpBodies.size;i++)
    {   
        if(tmpBodies.get(i).getType().equals(BodyType.DynamicBody) && 
           !tmpBodies.get(i).equals(car.getChassis()) &&
           !tmpBodies.get(i).equals(car.rightWheel)&& 
           !tmpBodies.get(i).equals(car.leftWheel)&& 
           !tmpBodies.get(i).equals(terrain))  // tmpBodies.get(i).getFixtureList().get(0).getShape().equals(Type.Chain)
        {
            ChainShape tempShape = new ChainShape();
            ArrayList<Vector2> bodyPoints = new ArrayList<Vector2>();

            tempShape = (ChainShape)tmpBodies.get(i).getFixtureList()
                                    .get(0).getShape();

            for(int q=0; q<tempShape.getVertexCount(); q++)
            {
                Vector2 linePoints = new Vector2();

                tempShape.getVertex(q, linePoints);

                Vector2 newLinePoints = tmpBodies.get(i).getWorldPoint(linePoints);
                bodyPoints.add(newLinePoints);
            }

            for(int z=0; z<tempShape.getVertexCount()-1; z++)
            {
                shapeRenderer.setColor(1, 1, 0, 1);
                shapeRenderer.line(bodyPoints.get(z).x,
                                   bodyPoints.get(z).y,
                                   bodyPoints.get(z+1).x,
                                   bodyPoints.get(z+1).y);
            }
        }
    }

回答1:

not if I explain well, that is, possible? you need use another matrix4, if using box2d eg units for PPM.

shapeRenderer.setProjectionMatrix(camera.combined);

change for example:

testMatrix4 Matrix4; //<-- Variable Class.

//in Your code

//Other Code

//batch or Camera Matrix

testMatrix4 = batch.getProyectionMatrix().cpy()
                .scale(YOUR_PPM_X, YOUR_PPM_Y, 0);

shapeRenderer.setProjectionMatrix(testMatrix4);

//Other Code

I never did something like this, but if it does not work, notify me, that I erase.

来源：https://stackoverflow.com/questions/28798600/libgdx-nested-shaperenderer-not-drawing-lines

标签

java

android

libgdx

box2d