stb_image

[fewdiefie]

I am using the famous stb_image to load some textures but I get this https://imgur.com/AtMQ6Gn instead of this https://imgur.com/hs8BUnq, any idea? I tried loading the image with the flag STBI_rgb as well as STBI_rgb_alpha and I have even tried to calculate the stride based on the width but that only made things even worse

[Ganado]

tried flag STBI_rgb as well as STBI_rgb_alpha

Can you show the actual line of code where you call it (and the variables you declare for the call).

And also show where you create the texture, assuming you're using some graphics API (DX? OpenGL?)

[fewdiefie]

yeah sure

void LoadTexture(const char* filename)
	{

		int width, height, nrChannels;
		unsigned char* data = stbi_load(filename, &width, &height, &nrChannels, STBI_rgb);
		if (data)
		{
			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
		}
		else
		{
			std::cout << "Failed to load texture" << std::endl;
		}
		stbi_image_free(data);
	}

EDIT: I feel like there is a problem with that width, maybe it has to be recalculated somehow

[Ganado]

To be honest, that looks OK to me. Just for fun, what happens if you use STBI_rgb_alpha and GL_RGBA?

If it's an issue with width alignment, maybe try calling glPixelStorei(GL_UNPACK_ALIGNMENT, 1); first thing within the if (data).

Also, what is the file format of filename?

[fewdiefie]

that worked! thanks

[fewdiefie]

an additional question, do you know how to apply such skybox textures to a cube, will it work if I use these texcoords { x: 0.0, 0.25, 0.5, 0.75, 1.0 } { y: 0.0, 0.33, 0.66, 1.0 }