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#include "atlas.hpp"
#include "loader.hpp"
#include "tile-shader.hpp"
#include <Corrade/Containers/ArrayViewStl.h>
#include <Corrade/PluginManager/Manager.h>
#include <Magnum/Magnum.h>
#include <Magnum/Math/Vector.h>
#include <Magnum/ImageView.h>
#include <Magnum/GL/Buffer.h>
#include <Magnum/GL/DefaultFramebuffer.h>
#include <Magnum/GL/Mesh.h>
#include <Magnum/GL/Renderer.h>
#include <Magnum/GL/TextureFormat.h>
#include <Magnum/Platform/Sdl2Application.h>
#include <Magnum/Trade/AbstractImporter.h>
#include <Magnum/GlmIntegration/Integration.h>
#include <glm/glm.hpp>
#include <glm/ext/matrix_transform.hpp>
#include <glm/ext/matrix_clip_space.hpp>
namespace Magnum::Examples {
struct application final : Platform::Application
{
using dpi_policy = Platform::Implementation::Sdl2DpiScalingPolicy;
explicit application(const Arguments& arguments);
virtual ~application();
void drawEvent() override;
GL::Mesh _mesh;
tile_shader _shader;
std::shared_ptr<atlas_texture> atlas =
//loader.tile_atlas("../share/game/images/tiles.tga", {8,4});
//loader.tile_atlas("../share/game/images/tiles2.tga", {8,5});
//loader.tile_atlas("../share/game/images/metal1.tga", {2, 2});
loader.tile_atlas("../share/game/images/floor1.tga", {4, 4});
static glm::mat<4, 4, double> make_projection(Vector2i window_size, Vector3 offset);
static float projection_size_ratio();
Matrix4x4 make_projection(Vector3 offset) const;
};
float application::projection_size_ratio()
{
auto m = make_projection({1, 1}, {});
glm::vec<4, double> pos = glm::vec<4, double>{.5, 0, 0, 1} * m;
return (float)(pos[0] / pos[3]);
}
glm::mat<4, 4, double> application::make_projection(Vector2i window_size, Vector3 offset)
{
using vec3 = glm::vec<3, double>;
using mat4 = glm::mat<4, 4, double>;
double x = window_size[0]*.5, y = window_size[1]*.5, w = 2*std::sqrt(x*x+y*y);
auto m = glm::ortho(-x, x, -y, y, -w, w);
//m = glm::ortho<double>(-.5, .5, -.5, .5, -100, 100);
m = glm::scale(m, { 1., 0.6, 1. });
m = glm::translate(m, { (double)offset[0], (double)-offset[1], (double)offset[2] });
m = glm::rotate(m, glm::radians(std::asin(1./std::sqrt(2))), vec3(1, 0, 0));
m = glm::rotate(m, glm::radians(-45.), vec3(0, 0, 1));
return glm::mat4(m);
}
Matrix4x4 application::make_projection(Vector3 offset) const
{
return Magnum::Matrix4x4{glm::mat4{make_projection(windowSize(), offset)}};
}
application::application(const Arguments& arguments):
Platform::Application{arguments, Configuration{}
.setTitle("Test")
.setSize({1024, 768}, dpi_policy::Physical)}
{
struct QuadVertex {
Vector3 position;
Vector2 textureCoordinates;
// todo gl_FragDepth
};
std::vector<QuadVertex> vertices; vertices.reserve(64*64*4);
std::vector<UnsignedShort> indices; indices.reserve(256);
auto sz = Vector2{50, 50} * projection_size_ratio();
int k = 0;
for (int j = -2; j <= 2; j++)
for (int i = -2; i <= 2; i++)
{
auto positions = atlas->floor_quad({(float)(sz[0]*i), (float)(sz[1]*j), 0}, sz);
auto texcoords = atlas->texcoords_for_id(k % atlas->size());
auto indices_ = atlas->indices(k);
for (unsigned x = 0; x < 4; x++)
vertices.push_back({ positions[x], texcoords[x] });
for (auto x : indices_)
indices.push_back(x);
k++;
}
_mesh.setCount((int)indices.size())
.addVertexBuffer(GL::Buffer{vertices}, 0,
tile_shader::Position{}, tile_shader::TextureCoordinates{})
.setIndexBuffer(GL::Buffer{indices}, 0, GL::MeshIndexType::UnsignedShort);
}
void application::drawEvent() {
GL::defaultFramebuffer.clear(GL::FramebufferClear::Color | GL::FramebufferClear::Depth);
//GL::Renderer::enable(GL::Renderer::Feature::DepthTest);
//GL::Renderer::setDepthMask(true);
using namespace Math::Literals;
_shader
.set_projection(make_projection({}))
.set_color(0xffffff_rgbf)
.bindTexture(atlas->texture())
.draw(_mesh);
swapBuffers();
}
application::~application()
{
loader_::destroy();
}
} // namespace Magnum::Examples
MAGNUM_APPLICATION_MAIN(Magnum::Examples::application);
#ifdef _MSC_VER
# include <cstdlib>
# ifdef __clang__
# pragma clang diagnostic ignored "-Wmissing-prototypes"
# pragma clang diagnostic ignored "-Wmain"
# endif
extern "C" int __stdcall WinMain(void*, void*, void*, int /* nCmdShow */) {
return main(__argc, __argv);
}
#endif
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