在OpenGL中绑定多个纹理无法正常工作[duplicate]

Question

我厌倦了绑定多个纹理我有一些奇怪的东西当我有两个或更多纹理时，它就结束了

主要的cpp

shaderProgram.bind();
const int NUMBER_OF_TEXTURE = textures.size();
auto sample = new int[NUMBER_OF_TEXTURE];
for (int i = 0; i < NUMBER_OF_TEXTURE; i++)
    sample[i] = i;

shaderProgram.setUniform1iv("u_Textuers", NUMBER_OF_TEXTURE, sample);
delete[] sample;

while (!glfwWindowShouldClose(window))
{
    processInput(window);

    Renderer::clear();
    shaderProgram.bind();

    for (int i = 0; i < NUMBER_OF_TEXTURE; i++)
    {
        textures[i].Bind(i);
    }
    render.draw(shaderProgram);
    GLCall(glBindTexture(GL_TEXTURE_2D, 0))


    ImGui::Render();
    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

    glfwSwapBuffers(window);
    glfwPollEvents();
}

纹理cpp

Texture::Texture(const FxrDataStructures::Image& image)
    :m_RendererID(0), m_LocalBuffer(nullptr),
    m_Width(0), m_Height(0), m_BPP(0)
{
    GLCall(glCreateTextures(GL_TEXTURE_2D, 1, &m_RendererID));
    GLCall(glBindTexture(GL_TEXTURE_2D, m_RendererID));

    // set the texture wrapping/filtering options (on the currently bound texture object)
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR))
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR))
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE))
    GLCall(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE))

    m_Width = image.getWidth();
    m_Height = image.getHeight();
    m_BPP = image.getBitDepth();

    cv::Mat mat = image.img;
    cv::flip(mat, mat, 0);
    m_LocalBuffer = mat.ptr();
    if (m_LocalBuffer)
    {
        GLCall(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_Width, m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_LocalBuffer))
        //GLCall(glGenerateMipmap(GL_TEXTURE_2D))
    }
    else
    {
        LOG_DEBUG("Failed to load texture ");
    }
    GLCall(glBindTexture(GL_TEXTURE_2D, 0))

}

void Texture::Bind(unsigned int slot) const
{

    GLCall(glBindTextureUnit(slot, m_RendererID))
}

片段着色器

in float IndexMaterial;

uniform sampler2D u_Textuers[32];
void main()
{
    float diff;
    const int index = int(IndexMaterial);

    FragColor = vec4(texture(u_Textuers[index], TexCoord));
}

Answer 1

我认为这与int到float的转换有关。似乎NVIDIA GPU在插值IndexMaterial时添加了一点随机噪声，而AMD GPU则没有。

尝试为索引材质使用平面着色。这将导致GPU使用来自一个顶点的值，而不是在顶点之间进行插值：

flat in float IndexMaterial;

请参阅：glsl中的“扁平”限定符？

您还可以将IndexMaterial从float更改为int，因为它没有浮动的充分理由。