sprite_tracking.py

"""Track screen coordinates of shapes in perspective space.
   by stephan)
"""
from slut import *

class Atlantis(World):
    def onSetup(self):
        self.name = "Form Follows Computation Here"
        self.width = 800
        self.height = 600
        self.showCoordinates = True
        p1 = Polygon(self, 'poly1')
        p2 = Polygon(self, 'poly2')
        p1.enableTracking()
        p2.enableTracking()
        p1.enableMouseEvents()
        p2.enableMouseEvents()
        p1.moveBy(Tween(1.0, 0.0, 0.0, 1.0))
        p2.moveBy(SineTween(-1.5, 0.0, -1.5, 1.0))
        p2.rotBy(SineTween(90.0, 0.0, 20.0, 2.0))
        tt = TagText(self, 'tag1', 36, 'times')
        tt.setText('TAG*')
        Box(self, 'box1', 0, 100, 50, 50)
        Box(self, 'box2', 0, 100, 50, 50)
        self.tags['box1'].setColor(1.0, 1.0, 1.0, 1.0)
        self.tags['box2'].setColor(1.0, 0.0, 0.0, 1.0)


    def onDraw(self):
        p1 = self.sprites['poly1']
        p2 = self.sprites['poly2']
        self.tags['box1'].setVertices(p1.min_x,
            p1.min_y, p1.max_x-p1.min_x, p1.max_y-p1.min_y)
        self.tags['box2'].setVertices(p2.min_x,
            p2.min_y, p2.max_x-p2.min_x, p2.max_y-p2.min_y)
        self.tags['tag1'].moveTo(p1.max_x, p1.min_y)



class Polygon(Sprite):
    def onDraw(self):
        glBegin(GL_POLYGON)
        glVertex3f(0.0, 0.0, 0.0)
        glVertex3f(1.0, 0.0, 0.0)
        glVertex3f(1.0, 1.0, 0.0)
        glVertex3f(-0.5, 1.5, 0.0)
        glVertex3f(0.0, 0.0, 0.0)
        glEnd()

    def onMouseButtonDown(self, event):
        if glo.ia.SHIFT:
            self.moveBy(Tween(1.0, 0.0, 0.0, 1.0))
        else:
            self.moveBy(SineTween(-1.0, 0.0, 0.0, 1.0))


atlantis = Atlantis()
atlantis.run()