mirror of
https://github.com/ciphervance/supercell-wx.git
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96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
#include <scwx/qt/gl/draw/draw_item.hpp>
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#include <string>
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#pragma warning(push, 0)
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include <mbgl/util/constants.hpp>
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#pragma warning(pop)
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namespace scwx
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{
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namespace qt
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{
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namespace gl
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{
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namespace draw
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{
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static const std::string logPrefix_ = "scwx::qt::gl::draw::draw_item";
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class DrawItem::Impl
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{
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public:
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explicit Impl(OpenGLFunctions& gl) : gl_ {gl} {}
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~Impl() {}
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OpenGLFunctions& gl_;
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};
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DrawItem::DrawItem(OpenGLFunctions& gl) : p(std::make_unique<Impl>(gl)) {}
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DrawItem::~DrawItem() = default;
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DrawItem::DrawItem(DrawItem&&) noexcept = default;
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DrawItem& DrawItem::operator=(DrawItem&&) noexcept = default;
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void DrawItem::UseDefaultProjection(
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const QMapbox::CustomLayerRenderParameters& params, GLint uMVPMatrixLocation)
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{
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glm::mat4 projection = glm::ortho(0.0f,
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static_cast<float>(params.width),
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0.0f,
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static_cast<float>(params.height));
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p->gl_.glUniformMatrix4fv(
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uMVPMatrixLocation, 1, GL_FALSE, glm::value_ptr(projection));
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}
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// TODO: Refactor to utility class
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static glm::vec2
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LatLongToScreenCoordinate(const QMapbox::Coordinate& coordinate)
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{
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double latitude = std::clamp(
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coordinate.first, -mbgl::util::LATITUDE_MAX, mbgl::util::LATITUDE_MAX);
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glm::vec2 screen {
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mbgl::util::LONGITUDE_MAX + coordinate.second,
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-(mbgl::util::LONGITUDE_MAX -
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mbgl::util::RAD2DEG *
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std::log(std::tan(M_PI / 4.0 +
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latitude * M_PI / mbgl::util::DEGREES_MAX)))};
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return screen;
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}
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void DrawItem::UseMapProjection(
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const QMapbox::CustomLayerRenderParameters& params,
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GLint uMVPMatrixLocation,
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GLint uMapScreenCoordLocation)
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{
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OpenGLFunctions& gl = p->gl_;
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// TODO: Refactor to utility class
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const float scale = std::pow(2.0, params.zoom) * 2.0f *
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mbgl::util::tileSize / mbgl::util::DEGREES_MAX;
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const float xScale = scale / params.width;
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const float yScale = scale / params.height;
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glm::mat4 uMVPMatrix(1.0f);
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uMVPMatrix = glm::scale(uMVPMatrix, glm::vec3(xScale, yScale, 1.0f));
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uMVPMatrix = glm::rotate(uMVPMatrix,
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glm::radians<float>(params.bearing),
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glm::vec3(0.0f, 0.0f, 1.0f));
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gl.glUniform2fv(uMapScreenCoordLocation,
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1,
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glm::value_ptr(LatLongToScreenCoordinate(
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{params.latitude, params.longitude})));
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gl.glUniformMatrix4fv(
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uMVPMatrixLocation, 1, GL_FALSE, glm::value_ptr(uMVPMatrix));
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}
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} // namespace draw
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} // namespace gl
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} // namespace qt
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} // namespace scwx
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