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#include "atlas.hpp"
#include "tile-shader.hpp"
#include <Corrade/Containers/Optional.h>
#include <Corrade/Containers/ArrayViewStl.h>
#include <Corrade/PluginManager/Manager.h>
#include <Corrade/Utility/Resource.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/Trade/ImageData.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
{
explicit application(const Arguments& arguments);
void drawEvent() override;
const Utility::Resource rs{"texturedquad-data"};
PluginManager::Manager<Trade::AbstractImporter> plugins;
Containers::Pointer<Trade::AbstractImporter> tga_importer =
plugins.loadAndInstantiate("TgaImporter");
GL::Mesh _mesh;
tile_shader _shader;
atlas_texture atlas = make_atlas("../share/game/images/tiles.tga", {8, 4});
atlas_texture make_atlas(const std::string& file, Vector2i dims);
Matrix4x4 make_projection(Vector3 offset);
};
using dpi_policy = Platform::Implementation::Sdl2DpiScalingPolicy;
application::application(const Arguments& arguments):
Platform::Application{arguments, Configuration{}
.setTitle("Test")
.setSize({640, 480}, dpi_policy::Physical)}
{
struct QuadVertex {
Vector3 position;
Vector2 textureCoordinates;
// todo gl_FragDepth
};
std::vector<QuadVertex> vertices; vertices.reserve(64*64*4);
std::vector<Short> indices; indices.reserve(64*64*4);
int k = 0;
for (int j = -2; j <= 2; j++)
for (int i = -2; i <= 2; i++)
{
constexpr int sz = 48;
auto positions = atlas.floor_quad({(float)(sz*i), (float)(sz*j), 0}, {sz, 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((Short)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({0, 0, 0}))
.set_color(0xffffff_rgbf)
.bindTexture(atlas.texture())
.draw(_mesh);
swapBuffers();
}
atlas_texture application::make_atlas(const std::string& file, Vector2i dims)
{
if(!tga_importer || !tga_importer->openFile(file))
std::exit(1);
Containers::Optional<Trade::ImageData2D> image = tga_importer->image2D(0);
CORRADE_INTERNAL_ASSERT(image);
return atlas_texture{*image, dims};
}
Matrix4x4 application::make_projection(Vector3 offset)
{
using vec3 = glm::vec<3, double, glm::highp>;
using mat4 = glm::mat<4, 4, double, glm::highp>;
auto m = mat4{1};
auto size = windowSize();
double x = size[0]*.5, y = size[1]*.5, w = 4*sqrt(x*x+y*y);
m = glm::ortho<double>(-x, x, -y, y, -w, w);
m = glm::translate(m, { (double)offset[0], (double)-offset[1], (double)offset[2] });
m = glm::scale(m, { 1., 0.6, 1. });
m = glm::rotate(m, glm::radians(-45.), vec3(1, 0, 0));
m = glm::rotate(m, glm::radians(0.), vec3(0, 1, 0));
m = glm::rotate(m, glm::radians(-45.), vec3(0, 0, 1));
return Matrix4x4{glm::mat4(m)};
}
} // 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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