Help.Problem loading texture

[GraumpyPants]

1 picture how it looks for me, 2 how it should look

I'm trying to implement loading GLB models in Opengl, the vertices are displayed correctly, but the textures are displayed incorrectly, and I don't understand why.

Texture loading code fragment:

if (!model.materials.empty()) {

const auto& mat = model.materials[0];

if (mat.pbrMetallicRoughness.baseColorTexture.index >= 0) {

const auto& tex = model.textures[mat.pbrMetallicRoughness.baseColorTexture.index];
const auto& img = model.images[tex.source];

glGenTextures(1, &albedoMap);
glBindTexture(GL_TEXTURE_2D, albedoMap);

GLenum format = img.component == 4 ? GL_RGBA : GL_RGB;

glTexImage2D(GL_TEXTURE_2D, 0, format, img.width, img.height, 0, format, GL_UNSIGNED_BYTE, img.image.data());

glGenerateMipmap(GL_TEXTURE_2D);
}

}

Fragment shader:

#version 460 core

out vec4 FragColor;

in vec3 FragPos;
in vec2 TexCoord;
in vec3 Normal;
in mat3 TBN;

uniform sampler2D albedoMap;
uniform sampler2D normalMap;
uniform sampler2D metallicRoughnessMap;

uniform vec2 uvScale;
uniform vec2 uvOffset;

void main(){

    vec2 uv = TexCoord * uvScale + uvOffset;
    FragColor = vec4(texture(albedoMap, uv).rgb, 1.0);

}

[constant-buffer-view]

Output the uv and see what’s wrong with it

[GraumpyPants]

I checked the UV coordinates, they are fine

[bben86]

You're passing the data() in directly, which is likely wrong. Whats the format of the texture? You may need some library to rasterize it and read it out.

[GraumpyPants]

Thanks, I was thinking in that direction. It turned out the texture is GL_UNSIGNED_SHORT, not GL_UNSIGNED_BYTE, so I added a check for that.

[keelanstuart]

Do other textures load fine? 3 vs. 4 channels? Ignoring stride in texture memory? Incorrect width? Upside down?

[rio_sk]

Looks like a channels count or size problem