I'm following ThinMatrix's guide on Youtube and trying to create a skybox for my engine. However, my skybox comes out black. I've tried all the different suggestions and common mistakes that people suggested in the comments, I can not for the life of me figure out what is wrong with it.
I'm not getting any error either :/
Bellow are the relevant methods in the relevant classes. I can provide more code if needed.
Loader.java
public int loadCubeMap(String[] cubeMapTextures) {
int textureID = GL11.glGenTextures();
GL13.glActiveTexture(GL13.GL_TEXTURE0);
GL11.glBindTexture(GL13.GL_TEXTURE_CUBE_MAP, textureID);
for (int i = 0; i < cubeMapTextures.length; i++) {
TextureData data = decodeTexture("res/skybox/" + cubeMapTextures[i] + ".png");
GL11.glTexImage2D(GL13.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL11.GL_RGBA, data.getWidth(), data.getHeight(),
0, GL11.GL_RGBA, GL11.GL_UNSIGNED_BYTE, data.getBuffer());
}
GL11.glTexParameteri(GL13.GL_PROXY_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL13.GL_PROXY_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL13.GL_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
GL11.glTexParameteri(GL13.GL_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
textures.add(textureID);
return textureID;
}
private TextureData decodeTexture(String fileName) {
int width = 0;
int height = 0;
ByteBuffer buffer = null;
try {
FileInputStream in = new FileInputStream(fileName);
PNGDecoder decoder = new PNGDecoder(in);
width = decoder.getWidth();
height = decoder.getHeight();
buffer = ByteBuffer.allocateDirect(4 * width * height);
decoder.decode(buffer, width * 4, Format.RGBA);
buffer.flip();
in.close();
} catch (Exception e) {
e.printStackTrace();
System.err.println("Failed loading: " + fileName);
System.exit(-1);
}
return new TextureData(height, width, buffer);
}
SkyboxRenderer.java
private static final float SIZE = 500f;
private static final float[] VERTICES = {
-SIZE, SIZE, -SIZE,
-SIZE, -SIZE, -SIZE,
SIZE, -SIZE, -SIZE,
SIZE, -SIZE, -SIZE,
SIZE, SIZE, -SIZE,
-SIZE, SIZE, -SIZE,
-SIZE, -SIZE, SIZE,
-SIZE, -SIZE, -SIZE,
-SIZE, SIZE, -SIZE,
-SIZE, SIZE, -SIZE,
-SIZE, SIZE, SIZE,
-SIZE, -SIZE, SIZE,
SIZE, -SIZE, -SIZE,
SIZE, -SIZE, SIZE,
SIZE, SIZE, SIZE,
SIZE, SIZE, SIZE,
SIZE, SIZE, -SIZE,
SIZE, -SIZE, -SIZE,
-SIZE, -SIZE, SIZE,
-SIZE, SIZE, SIZE,
SIZE, SIZE, SIZE,
SIZE, SIZE, SIZE,
SIZE, -SIZE, SIZE,
-SIZE, -SIZE, SIZE,
-SIZE, SIZE, -SIZE,
SIZE, SIZE, -SIZE,
SIZE, SIZE, SIZE,
SIZE, SIZE, SIZE,
-SIZE, SIZE, SIZE,
-SIZE, SIZE, -SIZE,
-SIZE, -SIZE, -SIZE,
-SIZE, -SIZE, SIZE,
SIZE, -SIZE, -SIZE,
SIZE, -SIZE, -SIZE,
-SIZE, -SIZE, SIZE,
SIZE, -SIZE, SIZE
};
private static String[] textureFiles = {"stormydays_rt", "stormydays_lf", "stormydays_up", "stormydays_dn", "stormydays_bk", "stormydays_ft"};
private RawModel cube;
private int textureID;
private SkyboxShader shader;
public SkyBoxRenderer(Loader loader, Matrix4f projectionMatrix) {
cube = loader.loadToVAO(VERTICES, 3);
textureID = loader.loadCubeMap(textureFiles);
shader = new SkyboxShader();
shader.start();
shader.loadProjectionMatrix(projectionMatrix);
shader.stop();
}
public void render(Camera camera) {
shader.start();
shader.loadViewMatrix(camera);
GL30.glBindVertexArray(cube.getVaoID());
GL20.glEnableVertexAttribArray(0);
GL13.glActiveTexture(GL13.GL_TEXTURE0);
GL11.glBindTexture(GL13.GL_TEXTURE_CUBE_MAP, textureID);
GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, cube.getVertexCount());
GL20.glDisableVertexAttribArray(0);
GL30.glBindVertexArray(0);
shader.stop();
}
SkyboxShader.java
private static final String VERTEX_FILE = "src/shaders/skyboxVertexShader.txt";
private static final String FRAGMENT_FILE = "src/shaders/skyboxFragmentShader.txt";
private int location_projectionMatrix;
private int location_viewMatrix;
public SkyboxShader() {
super(VERTEX_FILE, FRAGMENT_FILE);
}
public void loadProjectionMatrix(Matrix4f matrix){
super.loadMatrix(location_projectionMatrix, matrix);
}
public void loadViewMatrix(Camera camera){
Matrix4f matrix = Maths.createViewMatrix(camera);
super.loadMatrix(location_viewMatrix, matrix);
}
@Override
protected void getAllUniformLocations() {
location_projectionMatrix = super.getUniformLocation("projectionMatrix");
location_viewMatrix = super.getUniformLocation("viewMatrix");
}
@Override
protected void bindAttributes() {
super.bindAttribute(0, "position");
}
And here is my GLSL code skyboxVertexShader
#version 400
in vec3 position;
out vec3 textureCoords;
uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
void main(void){
gl_Position = projectionMatrix * viewMatrix * vec4(position, 1.0);
textureCoords = position;
}
skyboxFragmentShader
#version 400
in vec3 textureCoords;
out vec4 out_Color;
uniform samplerCube cubeMap;
void main(void){
out_Color = texture(cubeMap, textureCoords);
}
This probably happens because the texture isn't complete.
To complete your cube map texture you have to set GL_TEXTURE_WRAP_R with glTexParameteri because a cube is 3D.
Furthermore you are using GL_PROXY_TEXTURE_CUBE_MAP instead of GL_TEXTURE_CUBE_MAP, this does't work because proxy textures aren't a valid parameter.
So just replace:
GL11.glTexParameteri(GL13.GL_PROXY_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL13.GL_PROXY_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
GL11.glTexParameteri(GL13.GL_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
GL11.glTexParameteri(GL13.GL_TEXTURE_CUBE_MAP, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
With:
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
If this doesn't help, confirm that all textures have the same size.
PS: Use import static GL##.*;, then you can write methodName() instead of GL##.methodName() (replace ## with numbers)