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#include "tile-shader.hpp"
#include "loader.hpp"
#include <Corrade/Containers/Reference.h>
#include <Corrade/Utility/Resource.h>
#include <Magnum/GL/Context.h>
#include <Magnum/GL/Shader.h>
#include <Magnum/GL/Version.h>
namespace Magnum::Examples {
tile_shader::tile_shader()
{
MAGNUM_ASSERT_GL_VERSION_SUPPORTED(GL::Version::GL460);
GL::Shader vert{GL::Version::GL460, GL::Shader::Type::Vertex};
GL::Shader frag{GL::Version::GL460, GL::Shader::Type::Fragment};
vert.addSource(loader.shader("shaders/tile-shader.vert"));
frag.addSource(loader.shader("shaders/tile-shader.frag"));
CORRADE_INTERNAL_ASSERT_OUTPUT(GL::Shader::compile({vert, frag}));
attachShaders({vert, frag});
CORRADE_INTERNAL_ASSERT_OUTPUT(link());
setUniform(ScaleUniform, Vector2{640, 480});
}
tile_shader& tile_shader::bindTexture(GL::Texture2D& texture)
{
texture.bind(TextureUnit);
return *this;
}
tile_shader& tile_shader::set_scale(const Vector2& scale)
{
scale_ = scale;
setUniform(ScaleUniform, scale);
return *this;
}
tile_shader& tile_shader::set_camera_offset(Vector2 camera_offset)
{
CORRADE_INTERNAL_ASSERT(std::fabs(camera_offset[0]) <= std::scalbn(1.f, std::numeric_limits<float>::digits));
CORRADE_INTERNAL_ASSERT(std::fabs(camera_offset[1]) <= std::scalbn(1.f, std::numeric_limits<float>::digits));
camera_offset_ = camera_offset;
setUniform(OffsetUniform, camera_offset);
return *this;
}
Vector2 tile_shader::project(Vector3 pt)
{
float x = pt[1], y = pt[0], z = pt[2];
return { x-y, (x+y+z*2)*.75f };
}
} // namespace Magnum::Examples
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