func glSetupShaderProg(shader *shaderProg, unif bool) {
var glStatus gl.Int
shader.glFragShader = gl.CreateShader(gl.FRAGMENT_SHADER)
glSetShaderSource(shader.glFragShader, shader.srcFrag)
gl.CompileShader(shader.glFragShader)
if gl.GetShaderiv(shader.glFragShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
panic("Frag shader compile error: " + glGetInfoLog(shader.glFragShader, true))
}
shader.glVertShader = gl.CreateShader(gl.VERTEX_SHADER)
glSetShaderSource(shader.glVertShader, shader.srcVert)
gl.CompileShader(shader.glVertShader)
if gl.GetShaderiv(shader.glVertShader, gl.COMPILE_STATUS, &glStatus); glStatus == 0 {
panic("Vert shader compile error: " + glGetInfoLog(shader.glFragShader, true))
}
shader.glProg = gl.CreateProgram()
gl.AttachShader(shader.glProg, shader.glFragShader)
gl.AttachShader(shader.glProg, shader.glVertShader)
gl.LinkProgram(shader.glProg)
if gl.GetProgramiv(shader.glProg, gl.LINK_STATUS, &glStatus); glStatus == 0 {
panic("Shader program link error: " + glGetInfoLog(shader.glProg, false))
}
shader.attrPos = glGetLocation(shader.glProg, "aPos", true)
if unif {
shader.unifTex = gl.Int(glGetLocation(shader.glProg, "uTex", false))
}
}
func AddCanvas(newVerts []gl.Float, width, height int, retroFactor float64) int {
var canvas canvas.Canvas
var l int
canvas.TmpTex = TmpTexes[TmpTexIndex]
canvas.Index = gl.Int(len(Canvases))
canvas.Init(width, height, retroFactor)
canvas.Shaders = Shaders
Canvases = append(Canvases, &canvas)
if l = len(Canvases); l == 1 {
Canvas0 = &canvas
}
return l
}
func display() {
gl.ClearColor(0.19, 0.19, 0.21, 0)
gl.ClearDepth(1)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
gl.UseProgram(theProgram)
// Temporarily set the cam t clip
id := gls.Identity()
trans := getLookAtMatrix()
// log.Println(trans)
gls.UniformMatrix4fv(wtcm_unif, 1, false, trans)
gls.UniformMatrix4fv(mtwm_unif, 1, false, id)
// And here we do the actual rendering
// Generate a name for vufferobj and store it
gl.GenBuffers(1, &positionBufferObject)
// Bind it to a target
gl.BindBuffer(gl.ARRAY_BUFFER, positionBufferObject)
// Conver all nodes to a long array of vertexes!
i := 0
// TODO: Fix this, based on 4 per eleemnts
vpos := make([]float32, len(elements)*4*4)
elms := make(map[uint32]mS, len(elements))
// Note that the order here is undefined!
ii := 0
for k, v := range elements {
elms[k] = mS{ii, len(v.Nodes())}
for _, vv := range v.Nodes() {
ii++
vpos[i] = float32(nodes[vv][0])
i++
vpos[i] = float32(nodes[vv][1])
i++
vpos[i] = float32(nodes[vv][2])
i++
vpos[i] = 1.0
i++
}
}
/*
for _, v := range nodes {
vpos[i] = float32(v[0])
i++
vpos[i] = float32(v[1])
i++
vpos[i] = float32(v[2])
i++
}
*/
gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(32/8*len(vpos)), (gl.Pointer)(&vpos[0]), gl.STATIC_DRAW)
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindBuffer(gl.ARRAY_BUFFER, positionBufferObject)
gl.EnableVertexAttribArray(0)
gl.VertexAttribPointer(0, 4, gl.FLOAT, gl.FALSE, 0, (gl.Pointer)(nil))
/* for _,v := range elms {
}
*/
for _, v := range elms {
gl.DrawArrays(gl.LINE_LOOP, gl.Int(v.Start), gl.Sizei(v.Length))
}
// Draw Coordinate acis
/*for i := 9; i < 9+2*5; i += 2 {
gl.DrawArrays(gl.LINE_STRIP, gl.Int(i), 2)
}*/
}