OverlaySystem.cpp

#include "OverlaySystem.h"
 
#include "Context.h"
 
#include "Systems/Core/SpriteRenderSystem.h"
 
#include "Systems/Core/TransformSystem.h"
 
#include <glm/gtx/matrix_query.hpp>
 
void Cogs::Core::OverlaySystem::update(Context * context)
{
  auto sprites = context->spriteRenderSystem;
 
  for (const auto & overlay : pool) {
    if (!overlay.image) continue;
 
    auto spriteRenderer = overlay.getComponent<SpriteRenderComponent>();
 
    if (!spriteRenderer->isVisible()) continue;
 
    auto permutation = SpriteRenderSystem::getPermutation(overlay.positionMode, overlay.sizeMode);
 
    const bool transformImage = !glm::isIdentity(overlay.imageTransform, glm::epsilon<float>());
 
    if (transformImage) {
      static thread_local std::string p = permutation.to_string() + "ImageTransform";
 
      permutation = p;
    }
 
    const auto transform = overlay.getComponent<TransformComponent>();
    glm::vec3 position = glm::vec3(transform->coordinates) + transform->position;
 
    auto batch = sprites->begin(DefaultSpriteMaterial, permutation, overlay.image, overlay.color);
    batch->positionMode = overlay.positionMode;
    sprites->addSprite(spriteRenderer, glm::vec3(position.x, position.y, -1), overlay.size * 0.5f, overlay.size, glm::vec4(0, 0, 1, 1));
    batch->depth = position.z;
    batch->blendMode = overlay.blendMode;
 
    if (transformImage) {
      batch->material->setMat4Property(batch->material->material->getMat4Key("imageTransform"), overlay.imageTransform);
    }
  }
}