func Enable(cap Enum) {
defer func() {
errstr := errDrain()
log.Printf("gl.Enable(%v) %v", cap, errstr)
}()
C.glEnable(cap.c())
}
func InitGL(width, height, msaa int, fullscreen bool) {
C.SDL_Init(C.SDL_INIT_VIDEO)
C.SDL_VideoInit( /*nil*/ C.SDL_GetVideoDriver(0))
C.SDL_GL_SetAttribute(C.SDL_GL_CONTEXT_MAJOR_VERSION, 3)
C.SDL_GL_SetAttribute(C.SDL_GL_CONTEXT_MINOR_VERSION, 2)
if msaa != 0 {
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLEBUFFERS, 1)
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLESAMPLES, C.int(msaa))
}
C.SDL_GL_SetAttribute(C.SDL_GL_DEPTH_SIZE, 16)
//win = C.SDL_CreateWindow(nil, C.SDL_WINDOWPOS_CENTERED, C.SDL_WINDOWPOS_CENTERED,C.int(width), C.int(height), C.SDL_WINDOW_OPENGL)
if fullscreen {
win = C.SDL_CreateWindow(nil, C.SDL_WINDOWPOS_CENTERED, C.SDL_WINDOWPOS_CENTERED, C.int(width), C.int(height), C.SDL_WINDOW_OPENGL|C.SDL_WINDOW_FULLSCREEN_DESKTOP)
} else {
win = C.SDL_CreateWindow(nil, C.SDL_WINDOWPOS_CENTERED, C.SDL_WINDOWPOS_CENTERED, C.int(width), C.int(height), C.SDL_WINDOW_OPENGL)
}
C.SDL_ShowWindow(win)
wat := C.SDL_GL_CreateContext(win)
fmt.Println(C.GoString(C.SDL_GetVideoDriver(0)))
C.SDL_GL_MakeCurrent(win, wat)
//C.SDL_GL_SetSwapInterval(1)
C.glEnable(C.GL_DEPTH_TEST)
C.glDepthFunc(C.GL_LEQUAL)
C.glClearColor(0.3, 0.5, 1, 0)
C.glClear(C.GL_COLOR_BUFFER_BIT | C.GL_DEPTH_BUFFER_BIT)
printerr("failed to initialize openGL")
}
func init() {
//
right[0], front[1], top[2] = 1.0, 1.0, 1.0
matrix[3][3] = 1.
for l := 0; l < MaxL; l++ {
lightSource[l] = vect.New()
}
w := 2.0 * math.Pi / float64(nLamp)
sin[0], cos[0] = C.GLdouble(0.0), C.GLdouble(1.0)
sin[nLamp], cos[nLamp] = sin[0], cos[0]
for g := 1; g < nLamp; g++ {
sin[g] = C.GLdouble(math.Sin(float64(g) * w))
cos[g] = C.GLdouble(math.Cos(float64(g) * w))
}
sin[nLamp+1], sin[1] = cos[nLamp+1], cos[1]
// C.glDepthFunc (C.GL_LESS) // default
C.glEnable(C.GL_DEPTH_TEST)
C.glShadeModel(C.GL_SMOOTH)
for i := 0; i < 3; i++ {
lmAmb[i] = C.GLfloat(0.2)
} // default: 0.2
lmAmb[3] = C.GLfloat(1.0) // default: 1.0
C.glLightModelfv(C.GL_LIGHT_MODEL_AMBIENT, &lmAmb[0])
for i := 0; i < 3; i++ {
mAmbi[i] = C.GLfloat(0.2)
} // default: 0.2
mAmbi[3] = C.GLfloat(1.0) // default: 1.0
// C.glLightModelfv (C.GL_LIGHT_MODEL_TWO_SIDE, 1)
C.glMaterialfv(C.GL_FRONT_AND_BACK, C.GL_AMBIENT_AND_DIFFUSE, &mAmbi[0])
for i := 0; i < 3; i++ {
mDiff[i] = C.GLfloat(0.8)
} // default: 0.8
mDiff[3] = C.GLfloat(1.0) // default: 1.0
w = 1.
C.glClearDepth(C.GLclampd(w))
// C.glMaterialfv (C.GL_FRONT_AND_BACK, C.GL_DIFFUSE, mDiff)
// C.glColorMaterial (C.GL_FRONT_AND_BACK, C.GL_DIFFUSE)
// C.glColorMaterial (C.GL_FRONT, C.GL_AMBIENT)
C.glColorMaterial(C.GL_FRONT_AND_BACK, C.GL_AMBIENT_AND_DIFFUSE)
C.glEnable(C.GL_COLOR_MATERIAL)
C.glEnable(C.GL_LIGHTING)
initialize()
}
func (game *game) initGL() {
log.Printf("GL_VERSION: %v GL_RENDERER: %v GL_VENDOR %v\n",
GetString(C.GL_VERSION), GetString(C.GL_RENDERER), GetString(C.GL_VENDOR))
log.Printf("GL_EXTENSIONS: %v\n", GetString(C.GL_EXTENSIONS))
C.glClearColor(0.0, 0.0, 0.0, 1.0)
C.glEnable(C.GL_CULL_FACE)
C.glEnable(C.GL_DEPTH_TEST)
game.prog = createProgram(vertShaderSrcDef, fragShaderSrcDef)
posAttrib := attribLocation(game.prog, "vPosition")
game.offsetUni = uniformLocation(game.prog, "offset")
game.colorUni = uniformLocation(game.prog, "color")
C.glUseProgram(game.prog)
C.glEnableVertexAttribArray(C.GLuint(posAttrib))
vertVBO := GenBuffer()
checkGLError()
C.glBindBuffer(C.GL_ARRAY_BUFFER, vertVBO)
verts := []float32{.0, 0.5, -0.5, -0.5, 0.5, -0.5}
C.glBufferData(C.GL_ARRAY_BUFFER, C.GLsizeiptr(len(verts)*int(unsafe.Sizeof(verts[0]))), unsafe.Pointer(&verts[0]), C.GL_STATIC_DRAW)
C.glVertexAttribPointer(C.GLuint(posAttrib), 2, C.GL_FLOAT, C.GL_FALSE, 0, unsafe.Pointer(uintptr(0)))
}
func ActualizeLight(n uint) { // n < MaxL
//
var L [4]float64
L[0], L[1], L[2] = lightSource[n].Coord3()
var l [4]C.GLfloat
for i := 0; i < 3; i++ {
l[i] = C.GLfloat(L[i])
}
l[3] = C.GLfloat(1.0)
C.glLightfv(C.GL_LIGHT0+C.GLenum(n), C.GL_POSITION, &l[0])
C.glLightfv(C.GL_LIGHT0+C.GLenum(n), C.GL_AMBIENT, &aa[n][0])
C.glLightfv(C.GL_LIGHT0+C.GLenum(n), C.GL_DIFFUSE, &dd[n][0])
C.glEnable(C.GL_LIGHT0 + C.GLenum(n))
}
func Enable(cap Enum) {
C.glEnable(cap.c())
}
func Enable(
cap Enum) {
C.glEnable(C.GLenum(cap))
}
// Enable calls glEnable
func Enable(mask int) {
C.glEnable(C.GLenum(mask))
}
func Enable(c Capability) {
C.glEnable(C.GLenum(c))
}
func Enable(cap int) { C.glEnable(C.GLenum(cap)) }