我的场景颠倒了
我正在为一个小型项目渲染场景的渲染问题。 看起来,我的场景实际上是颠倒的,我不知道为什么。
您可以看到,选项按钮实际上是以正确的方向渲染的,而场景的其余部分则不是。 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;
}
这是相机的代码:
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;
...
}
任何人都可以帮忙吗?
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。 以下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:好的,问题是,按钮被渲染在飞机和立方体后面,因为绘制调用错位(它应该是最后一次调用,但是我在平面绘制和立方体绘制之前调用它)。 感谢大家的帮助。
_camera.setOrientation(180.0f,0.0f,0.0f,1.0f)
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