// Draw draws the Sprite object.
func (sprite *Sprite) Draw(frame int) error {
gl.BindBuffer(gl.ARRAY_BUFFER, sprite.shape.vertexBuffer)
gl.VertexAttribPointer(gl.Uint(0), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindAttribLocation(paunchEffect.program, gl.Uint(0), gl.GLString("position"))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
if sprite.texcoordBuffer != 0 {
gl.ActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, sprite.texcoordBuffer)
gl.VertexAttribPointer(gl.Uint(1), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindAttribLocation(paunchEffect.program, gl.Uint(0), gl.GLString("texcoord"))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindTexture(gl.TEXTURE_2D, sprite.texture[frame])
gl.EnableVertexAttribArray(gl.Uint(1))
}
gl.EnableVertexAttribArray(gl.Uint(0))
gl.DrawArrays(gl.TRIANGLES, 0, gl.Sizei(sprite.shape.size))
gl.DisableVertexAttribArray(gl.Uint(0))
gl.DisableVertexAttribArray(gl.Uint(1))
gl.BindTexture(gl.TEXTURE_2D, 0)
return checkForErrors()
}
func texinit(id int) {
gl.BindTexture(gl.TEXTURE_2D, gl.Uint(id))
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
}
// Draw draws the Shape object.
func (shape *Shape) Draw() error {
gl.BindBuffer(gl.ARRAY_BUFFER, shape.vertexBuffer)
vertexAttribLoc := gl.GetAttribLocation(paunchEffect.program, gl.GLString("position"))
gl.VertexAttribPointer(gl.Uint(vertexAttribLoc), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.EnableVertexAttribArray(gl.Uint(vertexAttribLoc))
gl.DrawArrays(shape.mode, 0, gl.Sizei(shape.size/2))
gl.DisableVertexAttribArray(gl.Uint(vertexAttribLoc))
//gl.DisableVertexAttribArray(gl.Uint(1))
//gl.BindTexture(gl.TEXTURE_2D, 0)
return checkForErrors()
}
func (s *Shader) initAttribute(name string, att *gl.Uint) {
att_name := gl.GLString(name)
defer gl.GLStringFree(att_name)
att_tmp := gl.GetAttribLocation(s.program, att_name)
if att_tmp == -1 {
fmt.Println("Error in getting attribute ", gl.GoString(att_name))
} else {
*att = gl.Uint(att_tmp)
}
}
// NewSprite creates a new Sprite object using the given data, which is
// expected to be in RGBA format. If you use PNG image files, you can use the
// NewSpriteFromImage shortcut function instead.
func NewSprite(x, y, width, height float64, data []byte, clip int) (*Sprite, error) {
verticies := []float64{
x, y,
x + width, y,
x, y + height,
x + width, y + height,
x + width, y,
x, y + height}
shape, err := NewShape(gl.TRIANGLES, verticies)
if err != nil {
return nil, err
}
sprite := &Sprite{texcoordBuffer: 0, texture: nil, shape: shape}
texCoords := []float32{
0, 0,
1, 0,
0, 1,
1, 1,
1, 0,
0, 1}
gl.GenBuffers(1, &sprite.texcoordBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(sprite.texcoordBuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(len(texCoords)*4), gl.Pointer(&texCoords[0]), gl.STREAM_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
sprite.texture = make([]gl.Uint, clip)
gl.GenTextures(gl.Sizei(clip), &sprite.texture[0])
clips := make([][]byte, clip)
for i := range clips {
clips[i] = data[i*(len(data)/len(clips)) : (i+1)*(len(data)/len(clips))]
gl.BindTexture(gl.TEXTURE_2D, sprite.texture[len(clips)-1-i])
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA,
gl.Sizei(width), gl.Sizei(height),
0, gl.RGBA, gl.UNSIGNED_BYTE,
gl.Pointer(&clips[i][0]))
}
gl.BindTexture(gl.TEXTURE_2D, 0)
return sprite, checkForErrors()
}
// SetVariablef sets a specified variable to the supplied integer to be passed
// into an effect.
func (effect *Effect) SetVariablef(variable string, val float32) error {
var currEffect gl.Int
gl.GetIntegerv(gl.CURRENT_PROGRAM, &currEffect)
if gl.Uint(currEffect) != effect.program {
return errors.New("effect is not currently in use")
}
effect.checkUniformVariable(variable)
gl.Uniform1f(effect.uniforms[variable], gl.Float(val))
return nil
}
// SetVariable4i sets a specified variable to the four supplied integers to be
// passed into an effect.
func (effect *Effect) SetVariable4i(variable string, val1 int, val2 int, val3 int, val4 int) error {
var currEffect gl.Int
gl.GetIntegerv(gl.CURRENT_PROGRAM, &currEffect)
if gl.Uint(currEffect) != effect.program {
return errors.New("effect is not currently in use")
}
effect.checkUniformVariable(variable)
gl.Uniform4i(effect.uniforms[variable], gl.Int(val1), gl.Int(val2), gl.Int(val3), gl.Int(val4))
return nil
}
// Sets up anything that wouldn't have been loaded from disk, including
// all opengl data, and sets up finalizers for that data.
func (d *Dictionary) setupGlStuff() {
d.dlists = make(map[string]uint32)
d.strs = make(map[string]strBuffer)
d.pars = make(map[string]strBuffer)
// TODO: This finalizer is untested
runtime.SetFinalizer(d, func(d *Dictionary) {
render.Queue(func() {
for _, v := range d.dlists {
gl.DeleteLists(gl.Uint(v), 1)
}
})
})
render.Queue(func() {
gl.Enable(gl.TEXTURE_2D)
gl.GenTextures(1, (*gl.Uint)(&d.texture))
gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))
gl.PixelStorei(gl.UNPACK_ALIGNMENT, 1)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(
gl.TEXTURE_2D,
0,
gl.ALPHA,
gl.Sizei(d.data.Dx),
gl.Sizei(d.data.Dy),
0,
gl.ALPHA,
gl.UNSIGNED_BYTE,
gl.Pointer(&d.data.Pix[0]))
gl.Disable(gl.TEXTURE_2D)
})
}
// NewShape creates a new Shape object based on the verticies and shape type.
func NewShape(shapeType ShapeType, verticies []float64) (*Shape, error) {
verticies32 := make([]float32, len(verticies))
for i, val := range verticies {
verticies32[i] = float32(val)
}
shape := &Shape{mode: gl.Enum(shapeType), size: len(verticies), vertexBuffer: 0, verticies: verticies32,
scaleX: 1, scaleY: 1}
gl.GenBuffers(1, &shape.vertexBuffer)
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(shape.vertexBuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(shape.size*4), gl.Pointer(&shape.verticies[0]), gl.DYNAMIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
return shape, checkForErrors()
}
func (mr *ModelReader) readModel(path string, m *Model) {
var num uint16
mr.readuint16(&num)
for i := 0; i < int(num); i++ {
var x, y, z float32
mr.readfloat32(&x)
mr.readfloat32(&y)
mr.readfloat32(&z)
m.vertices = append(m.vertices, gl.Float(x), gl.Float(y), gl.Float(z))
//fmt.Printf("vertices %f, %f, %f \n", x, y, z)
}
//fmt.Printf("m.vertices size %d \n", len(m.vertices))
var faces uint16
mr.readuint16(&faces)
//fmt.Println("nb faces : ", faces)
for i := 0; i < int(faces); i++ {
var x, y, z uint16
mr.readuint16(&x)
mr.readuint16(&y)
mr.readuint16(&z)
m.indices = append(m.indices, gl.Uint(x), gl.Uint(y), gl.Uint(z))
//fmt.Printf("face indices :%d, %d, %d \n", x, y, z)
}
var normals_num uint16
mr.readuint16(&normals_num)
for i := 0; i < int(normals_num); i++ {
var x, y, z float32
mr.readfloat32(&x)
mr.readfloat32(&y)
mr.readfloat32(&z)
m.normals = append(m.normals, gl.Float(x), gl.Float(y), gl.Float(z))
//fmt.Printf("normal %f, %f, %f \n", x, y, z)
}
var uvs_num uint16
mr.readuint16(&uvs_num)
//fmt.Printf("uvs num %d \n", uvs_num)
m.has_uv = uvs_num > 0
if m.has_uv {
for i := 0; i < int(uvs_num); i++ {
var x, y float32
mr.readfloat32(&x)
mr.readfloat32(&y)
m.uvs = append(m.uvs, gl.Float(x), gl.Float(y))
//fmt.Printf("uvs %f, %f \n", x, y)
}
}
}
func (d *Dictionary) RenderString(s string, x, y, z, height float64, just Justification) {
if len(s) == 0 {
return
}
strbuf, ok := d.strs[s]
if !ok {
defer d.RenderString(s, x, y, z, height, just)
} else {
render.EnableShader("glop.font")
diff := 20/math.Pow(height, 1.0) + 5*math.Pow(d.data.Scale, 1.0)/math.Pow(height, 1.0)
if diff > 0.4 {
// TODO: Need to come up with decent values here
diff = 0.4
}
render.SetUniformF("glop.font", "dist_min", float32(0.5-diff))
render.SetUniformF("glop.font", "dist_max", float32(0.5+diff))
defer render.EnableShader("")
}
size := unsafe.Sizeof(dictVert{})
scale := height / float64(d.data.Maxy-d.data.Miny)
width := float32(d.figureWidth(s) * scale)
x_pos := float32(x)
switch just {
case Center:
x_pos -= width / 2
case Right:
x_pos -= width
}
if ok {
gl.PushMatrix()
defer gl.PopMatrix()
gl.Translated(gl.Double(x_pos), gl.Double(y), gl.Double(z))
gl.Scaled(gl.Double(scale), gl.Double(scale), 1)
gl.PushAttrib(gl.COLOR_BUFFER_BIT)
defer gl.PopAttrib()
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.Enable(gl.TEXTURE_2D)
gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))
gl.EnableClientState(gl.VERTEX_ARRAY)
gl.VertexPointer(2, gl.FLOAT, gl.Sizei(size), nil)
gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(size), gl.Pointer(unsafe.Offsetof(strbuf.vs[0].u)))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
gl.DrawElements(gl.TRIANGLES, gl.Sizei(len(strbuf.is)), gl.UNSIGNED_SHORT, nil)
gl.DisableClientState(gl.VERTEX_ARRAY)
gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
gl.Disable(gl.TEXTURE_2D)
return
}
x_pos = 0
var prev rune
for _, r := range s {
if _, ok := d.data.Kerning[prev]; ok {
x_pos += float32(d.data.Kerning[prev][r])
}
prev = r
info := d.getInfo(r)
xleft := x_pos + float32(info.Full_bounds.Min.X)
xright := x_pos + float32(info.Full_bounds.Max.X)
ytop := float32(info.Full_bounds.Max.Y) + float32(-d.data.Miny)
ybot := float32(info.Full_bounds.Min.Y) + float32(-d.data.Miny)
start := uint16(len(strbuf.vs))
strbuf.is = append(strbuf.is, start+0)
strbuf.is = append(strbuf.is, start+1)
strbuf.is = append(strbuf.is, start+2)
strbuf.is = append(strbuf.is, start+0)
strbuf.is = append(strbuf.is, start+2)
strbuf.is = append(strbuf.is, start+3)
strbuf.vs = append(strbuf.vs, dictVert{
x: xleft,
y: ytop,
u: float32(info.Pos.Min.X) / float32(d.data.Dx),
v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xleft,
y: ybot,
u: float32(info.Pos.Min.X) / float32(d.data.Dx),
v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xright,
y: ybot,
u: float32(info.Pos.Max.X) / float32(d.data.Dx),
v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
})
strbuf.vs = append(strbuf.vs, dictVert{
x: xright,
y: ytop,
u: float32(info.Pos.Max.X) / float32(d.data.Dx),
v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
})
x_pos += float32(info.Advance) // - float32((info.Full_bounds.Dx() - info.Bounds.Dx()))
}
gl.GenBuffers(1, (*gl.Uint)(&strbuf.vbuffer))
gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(int(size)*len(strbuf.vs)), gl.Pointer(&strbuf.vs[0].x), gl.STATIC_DRAW)
gl.GenBuffers(1, (*gl.Uint)(&strbuf.ibuffer))
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(strbuf.is[0]))*len(strbuf.is)), gl.Pointer(&strbuf.is[0]), gl.STATIC_DRAW)
d.strs[s] = strbuf
}
