func (s *System) Run(ctx *scene.Context) {
s.init(ctx)
defer s.finish()
// TODO: take active camera node
w := float32(s.Width)
h := float32(s.Height)
projM := mathgl.Ortho(0, w, h, 0, -30, 30)
viewM := mathgl.Translate3D(0, 0, 0)
worldM := mathgl.Translate3D(0, 0, 0)
var rect struct {
WVP mathgl.Mat4f `uniform:"WorldViewProjectionM"`
Diffuse *gfx.Sampler2D `uniform:"Diffuse"`
geomobj gfx.Geometry
geom gfx.GeometryLayout
}
rect.WVP = projM.Mul4(viewM).Mul4(worldM)
s.cmds <- func() {
quadbuffer := geometry.NewBuilder(s.shader.VertexFormat())
quadbuffer.Clear()
quadbuffer.P(0, 0, 0).UV(-1, -1).Cf(1, 1, 1, 1)
quadbuffer.P(w/3, 0, 0).UV(-1, -1)
quadbuffer.P(w/3, h/3, 0).UV(-1, -1)
quadbuffer.P(0, h/3, 0).UV(-1, -1)
quadbuffer.Indices(0, 1, 2, 2, 0, 3)
rect.geomobj.Alloc(gfx.StaticDraw)
err := rect.geomobj.CopyFrom(quadbuffer)
if err != nil {
panic(err)
}
s.shader.Use()
rect.geom.Layout(&s.shader, &rect.geomobj)
/*
err = rect.geomobj.CopyFrom(quadbuffer)
if err != nil {
panic(err)
}
*/
whiteImg := image.NewNRGBA(image.Rect(0, 0, 1, 1))
whiteImg.Set(0, 0, color.White)
white, err := gfx.Image(whiteImg)
if err != nil {
panic(err)
}
rect.Diffuse = white
}
for ctx.Step() {
s.cmds <- func() {
gl.Viewport(0, 0, s.Width, s.Height)
gl.ClearColor(0, 0, 0, 1.0)
gl.ClearDepth(1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
}
s.meshes.update(s.cmds, &s.shader)
s.draw()
s.sync()
}
}
func createTexture(r io.Reader) (gfx.Sampler, error) {
img, err := png.Decode(r)
if err != nil {
return nil, err
}
rgbaImg, ok := img.(*image.NRGBA)
if !ok {
return nil, errors.New("texture must be an NRGBA image")
}
return gfx.Image(rgbaImg)
}