48 lines
1 KiB
Text
48 lines
1 KiB
Text
// Kotlin Native version 0.3
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import kotlinx.cinterop.*
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import opengl.*
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fun paint() {
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glClearColor(0.3f, 0.3f, 0.3f, 0.0f)
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glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT)
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glShadeModel(GL_SMOOTH)
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glLoadIdentity()
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glTranslatef(-15.0f, -15.0f, 0.0f)
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glBegin(GL_TRIANGLES)
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glColor3f(1.0f, 0.0f, 0.0f)
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glVertex2f(0.0f, 0.0f)
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glColor3f(0.0f, 1.0f, 0.0f)
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glVertex2f(30.0f, 0.0f)
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glColor3f(0.0f, 0.0f, 1.0f)
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glVertex2f(0.0f, 30.0f)
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glEnd()
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glFlush()
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}
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fun reshape(width: Int, height: Int) {
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glViewport(0, 0, width, height)
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glMatrixMode(GL_PROJECTION)
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glLoadIdentity()
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glOrtho(-30.0, 30.0, -30.0, 30.0, -30.0, 30.0)
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glMatrixMode(GL_MODELVIEW)
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}
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fun main(args: Array<String>) {
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memScoped {
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val argc = alloc<IntVar>().apply { value = 0 }
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glutInit(argc.ptr, null)
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}
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glutInitWindowSize(640, 480)
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glutCreateWindow("Triangle")
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glutDisplayFunc(staticCFunction(::paint))
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glutReshapeFunc(staticCFunction(::reshape))
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glutMainLoop()
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}
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