stk-code_catmod/data/shaders/ge_shaders/spm_skinning.vert

#include "utils/spm_layout.h"
#include "../utils/get_world_location.vert"

void main()
{
    int offset = u_object_buffer.m_objects[gl_InstanceIndex].m_skinning_offest;
    mat4 joint_matrix =
        v_weight[0] * u_skinning_matrices.m_mat[max(v_joint[0] + offset, 0)] +
        v_weight[1] * u_skinning_matrices.m_mat[max(v_joint[1] + offset, 0)] +
        v_weight[2] * u_skinning_matrices.m_mat[max(v_joint[2] + offset, 0)] +
        v_weight[3] * u_skinning_matrices.m_mat[max(v_joint[3] + offset, 0)];
    vec4 v_skinning_position = joint_matrix * vec4(v_position.xyz, 1.0);
    vec4 v_world_position = getWorldPosition(
        u_object_buffer.m_objects[gl_InstanceIndex].m_position.xyz,
        u_object_buffer.m_objects[gl_InstanceIndex].m_rotation,
        u_object_buffer.m_objects[gl_InstanceIndex].m_scale.xyz,
        v_skinning_position.xyz);
    gl_Position = u_camera.m_projection_view_matrix * v_world_position;
    f_vertex_color = v_color.zyxw;
    f_uv = v_uv;
    f_uv_two = v_uv_two;
    f_material_id = u_object_buffer.m_objects[gl_InstanceIndex].m_material_id;
}