layout(location = ATTRIBUTE_LOCATION_POSITION) in vec3 a_Position;
layout(location = ATTRIBUTE_LOCATION_COLOR) in vec4 a_Color;
layout(location = ATTRIBUTE_LOCATION_SIZE) in float a_Size;
layout(location = ATTRIBUTE_LOCATION_POS) in vec3 a_Pos;
layout(location = ATTRIBUTE_LOCATION_NORMAL) in vec3 a_Normal;

layout(std140) uniform commonUniforms {
  vec2 u_radius;
  float u_opacity;
  float u_coverage;
  float u_angle;
};

out vec4 v_color;

#pragma include "projection"
#pragma include "project"
#pragma include "light"
#pragma include "picking"

void main() {
  mat2 rotationMatrix = mat2(cos(u_angle), sin(u_angle), -sin(u_angle), cos(u_angle));
  vec2 offset = vec2(a_Position.xy * u_radius * rotationMatrix * u_coverage);

  vec2 lnglat = unProjectFlat(a_Pos.xy + offset); // 实际的经纬度
  vec4 project_pos = project_position(vec4(lnglat, a_Position.z * a_Size, 1.0));

  float lightWeight = calc_lighting(project_pos);
  v_color = vec4(a_Color.rgb * lightWeight, a_Color.w);

  gl_Position = project_common_position_to_clipspace(project_pos);

  setPickingColor(a_PickingColor);
}