OpenGL/Utah teapot: Difference between revisions
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}
</lang>
=={{header|Go}}==
{{trans|C}}
{{libheader|FreeGLUT}}
<br>
Although there are a number of third party Go bindings for OpenGL, the following uses 'cgo' to interface directly with the C libraries.
<lang go>package main
/*
#cgo LDFLAGS: -lGL -lGLU -lglut
#include <stdlib.h>
#include <GL/freeglut.h>
extern void display();
extern void onIdle();
typedef void (*callback) ();
static inline callback displayFunc() {
return display;
}
static inline callback idleFunc() {
return onIdle;
}
*/
import "C"
import "unsafe"
var rot = 0.0
var matCol = [4]C.float{1, 0, 0, 0}
//export display
func display() {
C.glClear(C.GL_COLOR_BUFFER_BIT | C.GL_DEPTH_BUFFER_BIT)
C.glPushMatrix()
C.glRotatef(30, 1, 1, 0)
C.glRotatef(C.float(rot), 0, 1, 1)
C.glMaterialfv(C.GL_FRONT, C.GL_DIFFUSE, &matCol[0])
C.glutWireTeapot(0.5)
C.glPopMatrix()
C.glFlush()
}
//export onIdle
func onIdle() {
rot += 0.01
C.glutPostRedisplay()
}
func initialize() {
white := [4]C.float{1, 1, 1, 0}
shini := [1]C.float{70}
C.glClearColor(0.5, 0.5, 0.5, 0)
C.glShadeModel(C.GL_SMOOTH)
C.glLightfv(C.GL_LIGHT0, C.GL_AMBIENT, &white[0])
C.glLightfv(C.GL_LIGHT0, C.GL_DIFFUSE, &white[0])
C.glMaterialfv(C.GL_FRONT, C.GL_SHININESS, &shini[0])
C.glEnable(C.GL_LIGHTING)
C.glEnable(C.GL_LIGHT0)
C.glEnable(C.GL_DEPTH_TEST)
}
func main() {
argc := C.int(0)
C.glutInit(&argc, nil)
C.glutInitDisplayMode(C.GLUT_SINGLE | C.GLUT_RGB | C.GLUT_DEPTH)
C.glutInitWindowSize(900, 700)
tl := "The Amazing, Rotating Utah Teapot brought to you in OpenGL via freeglut."
tlc := C.CString(tl)
C.glutCreateWindow(tlc)
initialize()
C.glutDisplayFunc(C.displayFunc())
C.glutIdleFunc(C.idleFunc())
C.glutMainLoop()
C.free(unsafe.Pointer(tlc))
}</lang>
=={{header|Kotlin}}==
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