void Render() {
using namespace oglplus;
gl.Clear().ColorBuffer().DoIt();
GLfloat t = GLfloat(FrameTime());
rndr.Use();
text_stream.str(std::string());
text_stream << "Time: " << std::fixed << std::setw(5)
<< std::setprecision(3) << t << " [s]";
if(time_str != text_stream.str()) {
time_str = text_stream.str();
time_layout.Set(time_str);
}
rndr.SetCamera(CamMatrixf::Orbiting(
Vec3f(),
GLfloat(9.0 + SineWave(t / 7.0) * 3.0),
-FullCircles(t / 17.0),
Degrees(SineWave(t / 21.0) * 35)));
rndr.SetLayoutTransform(ModelMatrixf::Translation(-3.0f, 0.7f, 1.1f));
rndr.Render(oglp_layout);
rndr.SetLayoutTransform(ModelMatrixf::Translation(-6.0f, -0.7f, 0.0f));
rndr.Render(desc_layout);
rndr.SetLayoutTransform(
ModelMatrixf::Translation(-4.0f, -2.0f, -0.5f) *
ModelMatrixf::Scale(0.7f, 0.7f, 0.5f));
rndr.Render(time_layout);
}
STBTruetypeExample(int argc, const char** argv)
: gl()
, tr(oglplus::text::STBTrueTypeRendering(0, 1, 2))
, font(tr.LoadFont((argc>1)?argv[1]:"FreeSans"))
, oglp_layout(tr.MakeLayout(font, "OGLplus"))
, desc_layout(tr.MakeLayout(font, u8"a C++ wrapper for OpenGL©"))
, time_layout(tr.MakeLayout(font, 25))
, rndr(tr.GetRenderer(
oglplus::FragmentShader(
oglplus::ObjectDesc("Pixel color"),
oglplus::StrCRef(
"#version 330\n"
"vec4 PixelColor("
" vec4 TexelColor,"
" vec3 GlyphPosition,"
" float GlyphXOffset,"
" vec2 GlyphExtent,"
" vec2 GlyphCoord,"
" float LayoutWidth"
")"
"{"
" float g = GlyphXOffset / LayoutWidth;"
" float b = GlyphCoord.y;"
" vec3 Color = mix("
" vec3(1.0, 0.2, 0.2+0.8*b), "
" vec3(0.2, 1.0, 0.2+0.8*b), "
" g"
" );"
" return vec4(Color, TexelColor.r);"
"}")
)
)
)
{
using namespace oglplus;
rndr.Use();
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFunction::SrcAlpha,
BlendFunction::DstAlpha
);
}
PangoCairoTextExample(int argc, const char** argv)
: gl()
, tr(0)
, font(tr.LoadFont((argc>2)?argv[2]:"Sans 38"))
, layout(tr.MakeLayout(font, 48))
, rndr(tr.GetRenderer(
oglplus::FragmentShader(
oglplus::ObjectDesc("Pixel color"),
"#version 330\n"
"uniform vec3 Color;"
"uniform float Opacity;"
"vec4 PixelColor("
" vec4 TexelColor,"
" vec3 GlyphPosition,"
" float GlyphXOffset,"
" vec2 GlyphExtent,"
" vec2 GlyphCoord,"
" float LayoutWidth"
")"
"{"
" return vec4(Color, TexelColor.r*Opacity);"
"}"
)
)
), rndr_color(rndr.GetUniform<oglplus::Vec3f>("Color"))
, rndr_opacity(rndr.GetUniform<GLfloat>("Opacity"))
, prev_interval(-1)
, current_line(0)
{
using namespace oglplus;
rndr.Use();
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFunction::SrcAlpha,
BlendFunction::DstAlpha
);
rndr.SetAlignment(text::Alignment::Center);
}