// deck.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors

import type {ShaderModule} from '@luma.gl/shadertools';
import project from '../project/project';

const vs = `
vec4 project_position_to_clipspace(
  vec3 position, vec3 position64Low, vec3 offset, out vec4 commonPosition
) {
  vec3 projectedPosition = project_position(position, position64Low);
  mat3 rotation;
  if (project_needs_rotation(projectedPosition, rotation)) {
    // offset is specified as ENU
    // when in globe projection, rotate offset so that the ground alighs with the surface of the globe
    offset = rotation * offset;
  }
  commonPosition = vec4(projectedPosition + offset, 1.0);
  return project_common_position_to_clipspace(commonPosition);
}

vec4 project_position_to_clipspace(
  vec3 position, vec3 position64Low, vec3 offset
) {
  vec4 commonPosition;
  return project_position_to_clipspace(position, position64Low, offset, commonPosition);
}
`;

export default {
  name: 'project32',
  dependencies: [project],
  vs
} as ShaderModule;