generate_quad_with_transform()

void MayaFlux::Buffers::TextureBuffer::generate_quad_with_transform ( )

private

Definition at line 220 of file TextureBuffer.cpp.

{
    if (m_uses_custom_vertices) {
        MF_DEBUG(Journal::Component::Buffers, Journal::Context::BufferProcessing,
            "TextureBuffer: using custom vertices, skipping transform");
        return;
    }
 
    float cos_rot = std::cos(m_rotation);
    float sin_rot = std::sin(m_rotation);
 
    std::vector<QuadVertex> transformed(4);
    for (size_t i = 0; i < 4; ++i) {
        glm::vec3 pos = base_quad[i].position;
 
        pos.x *= m_scale.x;
        pos.y *= m_scale.y;
 
        float rotated_x = pos.x * cos_rot - pos.y * sin_rot;
        float rotated_y = pos.x * sin_rot + pos.y * cos_rot;
 
        pos.x = rotated_x + m_position.x;
        pos.y = rotated_y + m_position.y;
 
        transformed[i].position = pos;
        transformed[i].texcoord = base_quad[i].texcoord;
    }
 
    m_vertex_bytes.resize(transformed.size() * sizeof(QuadVertex));
    std::memcpy(m_vertex_bytes.data(), transformed.data(), m_vertex_bytes.size());
 
    MF_DEBUG(Journal::Component::Buffers, Journal::Context::BufferProcessing,
        "TextureBuffer: regenerated quad with transform (pos={},{}, scale={},{}, rot={})",
        m_position.x, m_position.y, m_scale.x, m_scale.y, m_rotation);
}

References MayaFlux::Buffers::base_quad, MayaFlux::Journal::BufferProcessing, MayaFlux::Journal::Buffers, m_position, m_rotation, m_scale, m_uses_custom_vertices, m_vertex_bytes, and MF_DEBUG.