我正在为一个小型项目渲染一个场景的渲染问题。看起来,我的场景实际上是颠倒的,我不知道为什么。我的场景被颠倒渲染
您可以看到选项按钮实际上是用正确的方向呈现,而场景的其余部分是没有的。我试图简单地反转着色器返回的位置的y坐标,但它随着棕色立方体的运动而变化。
这是我写的着色器:
#ifndef GL_ES
#version 330
#endif
uniform mat4 u_projectionMatrix;
uniform mat4 u_viewMatrix;
uniform vec3 u_scale;
uniform mat4 u_rotation;
uniform vec3 u_position;
uniform vec2 u_textureScale;
uniform vec2 u_textureOffset;
attribute vec4 a_position;
attribute vec3 a_normal;
attribute vec2 a_texCoord0;
varying vec4 v_position;
varying vec4 v_normal;
varying vec2 v_texCoords;
void main()
{
// Not sure why some vec4's need 0 or 1, since it's the w-coordinate (shouldn't this always be 1 prior to applying the projection matrix?).
v_position = vec4(u_position, 0) + (u_rotation * (a_position * vec4(u_scale, 1)));
v_normal = normalize(u_rotation * vec4(a_normal, 0));
v_texCoords = (a_texCoord0 * u_textureScale) + u_textureOffset;
gl_Position = u_projectionMatrix * u_viewMatrix * v_position;
//gl_Position.y = -gl_Position.y;
}
这是摄像机的代码:
public void create() {
...
_camera = new PerspectiveCamera(67, Gdx.graphics.getWidth(),Gdx.graphics.getHeight());
_camera.translate(0, -10, 20);
_camera.lookAt(new Vector3(0,0,0));
_camera.near = 0.1f;
...
}
任何人可以帮助?
编辑:更改向上的y坐标可以修复场景的方向问题,但会使按钮消失,就像它没有呈现。下面是我用来绘制选项按钮的代码:
public void create() {
//camera code and other initialization stuff...
// Create new stage for the ui.
toggleOptions = new Stage();
// Add a menu button.
Table toggleBtn = new Table(skin);
toggleOptions.addActor(toggleBtn);
initUI();
...
}
private void initUI(){
final TextButton toggleMenuButton = new TextButton("Options", skin);
menuWidgets.put("toggleMenu", toggleMenuButton);
toggleMenuButton.addListener(new ChangeListener() {
@Override
public void changed(ChangeEvent event, Actor actor) {
// Toggle the menu.
showMenu = !showMenu;
}
});
// Set up button so that is appears in the bottom center of the screen (with some padding).
toggleMenuButton.setPosition((Gdx.graphics.getWidth()/2.0f) - toggleMenuButton.getWidth()/2.0f, padY);
toggleMenuButton.setWidth(toggleMenuButton.getWidth() + padX);
// Add the toggle button.
toggleOptions.addActor(toggleMenuButton);
}
public void render() {
...
toggleOptions.act();
toggleOptions.draw();
...
}
编辑2:好了,问题是,按钮是在平面和立体的背后呈现的,因为抽奖电话是没有道理的(它应该是最后一次通话,但我在平面绘制和立方体绘制之前调用了它)。感谢大家的帮助。
此:_camera.translate(0,-10,20);看起来可疑。如果你把10而不是-10? –
你在哪里以及如何设置视图矩阵?应该在你的代码中的某处调用Matrix.setLookAtM。向上矢量是否正确? – NigelK
@Tobor mmm ..它修复了场景的方向,但textbutton消失。 – AleDD