manim/manimlib/shaders/surface_vert.glsl

#version 330

uniform float aspect_ratio;
uniform float anti_alias_width;
uniform mat4 to_screen_space;
uniform float focal_distance;
uniform vec3 light_source_position;

in vec3 point;
in vec3 du_point;
in vec3 dv_point;
in vec4 color;
in float gloss;
in float shadow;

out vec3 xyz_coords;
out vec3 v_normal;
out vec4 v_color;
out float v_gloss;
out float v_shadow;

// These lines will get replaced
#INSERT position_point_into_frame.glsl
#INSERT get_gl_Position.glsl
#INSERT get_rotated_surface_unit_normal_vector.glsl

void main(){
    xyz_coords = position_point_into_frame(point);
    v_normal = get_rotated_surface_unit_normal_vector(point, du_point, dv_point);
    v_color = color;
    v_gloss = gloss;
    v_shadow = shadow;
    gl_Position = get_gl_Position(xyz_coords);
}