""" This file is part of the 'Elements' Project Elements is a 2D Physics API for Python (supporting Box2D2) Copyright (C) 2008, The Elements Team, Home: http://elements.linuxuser.at IRC: #elements on irc.freenode.org Code: http://www.assembla.com/wiki/show/elements svn co http://svn2.assembla.com/svn/elements License: GPLv3 | See LICENSE for the full text This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . """ from math import pi from math import cos from math import sin from math import sqrt import tools # Functions of a rendering class # mandatory: # __init__ # start_drawing # after_drawing # draw_circle # draw_polygon # draw_lines # set_lineWidth # # renderer-specific mandatory functions: # for pygame: # set_surface # for cairo: # draw_text # for opengl: # # IMPORTANT # The drawing functions get the coordinates in their screen coordinate system # no need for translations anymore :) class draw_pygame(object): """ This class handles the drawing with pygame, which is really simple since we only need draw_ellipse and draw_polygon. """ lineWidth = 0 def __init__(self): """ Load pygame.draw and pygame.Rect, and reference it for the drawing methods Parameters: surface .... pygame surface (default: None) lineWidth .. Return: Class draw_pygame() """ print "* Pygame selected as renderer" from pygame import draw from pygame import Rect self.draw = draw self.Rect = Rect def set_lineWidth(self, lw): """ """ self.lineWidth = lw def set_surface(self, surface): """ """ self.surface = surface def get_surface(self): """ """ return self.surface def start_drawing(self): pass def after_drawing(self): pass def draw_circle(self, clr, pt, radius, angle): """ Draw a circle Parameters: pt ........ (x, y) clr ....... color in rgb ((r), (g), (b)) radius .... circle radius angle ..... rotation in radians Return: - """ x, y = pt x1 = x - radius y1 = y - radius rect = self.Rect( [x1, y1, 2*radius, 2*radius] ) self.draw.ellipse(self.surface, clr, rect, self.lineWidth) # draw the orientation vector if radius > 10: rx = cos(angle) * radius ry = -sin(angle) * radius self.draw.line(self.surface, (255,255,255), pt, (x+rx, y+ry)) def draw_polygon(self, clr, points): """ Draw a polygon Parameters: clr ....... color in rgb ((r), (g), (b)) points .... polygon points in normal (x,y) positions Return: - """ self.draw.polygon(self.surface, clr, points, self.lineWidth) #self.draw.aalines(self.surface, clr, True, points) def draw_lines(self, clr, closed, points, width=None): """ Draw a polygon Parameters: clr ....... color in rgb ((r), (g), (b)) points .... polygon points in normal (x,y) positions Return: - """ if width == None: lw = self.lineWidth else: lw = width self.draw.lines(self.surface, clr, closed, points, lw) class draw_cairo(object): """ This class handles the drawing with cairo, which is really simple since we only need draw_ellipse and draw_polygon. """ window = None da = None circle_surface = None box_surface = None def __init__(self, drawMethod="filled"): """ Load cairo.draw and cairo.Rect, and reference it for the drawing methods Return: Class draw_cairo() """ print "* Cairo selected as renderer" import cairo self.cairo = cairo self.set_drawing_method(drawMethod) #self.draw_box = self.draw_box_image def set_lineWidth(self, lw): # unused self.lineWidth = lw def set_drawing_area(self, da): """ Set the area for Cairo to draw to da ...... drawing area (gtk.DrawingArea) Return: - """ self.da = da self.window = da.window print "* Cairo renderer drawing area set" def set_drawing_method(self, type): """ type = filled, image """ self.draw_circle = getattr(self, "draw_circle_%s" % type) #self.draw_box = getattr(self, "draw_box_%s" % type) def start_drawing(self): self.width, self.height = self.window.get_size() self.imagesurface = self.cairo.ImageSurface(self.cairo.FORMAT_ARGB32, self.width, self.height); self.ctx = ctx = self.cairo.Context(self.imagesurface) ctx.set_source_rgb(1, 1, 1) # background color ctx.paint() ctx.move_to(0, 0) ctx.set_source_rgb(0, 0, 0) # defaults for the rest of the drawing ctx.set_line_width(1) ctx.set_tolerance(0.1) ctx.set_line_join(self.cairo.LINE_CAP_BUTT) # LINE_CAP_BUTT, LINE_CAP_ROUND, LINE_CAP_SQUARE, LINE_JOIN_BEVEL, LINE_JOIN_MITER, LINE_JOIN_ROUND #ctx.set_dash([20/4.0, 20/4.0], 0) def after_drawing(self): dest_ctx = self.window.cairo_create() dest_ctx.set_source_surface(self.imagesurface) dest_ctx.paint() def set_circle_image(self, filename): self.circle_surface = self.cairo.ImageSurface.create_from_png(filename) self.draw_circle = self.draw_circle_image # def set_box_image(self, filename): # self.box_surface = self.cairo.ImageSurface.create_from_png(filename) # self.draw_box = self.draw_box_image def draw_circle_filled(self, clr, pt, radius, angle=0): x, y = pt clr = tools.rgb2floats(clr) self.ctx.set_source_rgb(*clr) self.ctx.move_to(x, y) self.ctx.arc(x, y, radius, 0, 2*3.1415) self.ctx.fill() def draw_circle(): pass def draw_circle_image(self, clr, pt, radius, angle=0, sf=None): if sf == None: sf = self.circle_surface x, y = pt self.ctx.save() self.ctx.translate(x, y) self.ctx.rotate(-angle) image_r = sf.get_width() / 2 scale = float(radius) / image_r self.ctx.scale(scale, scale) self.ctx.translate(-0.5*sf.get_width(), -0.5*sf.get_height()) self.ctx.set_source_surface(sf) self.ctx.paint() self.ctx.restore() def draw_image(self, source, pt, scale=1.0, rot=0, sourcepos=(0,0)): self.ctx.save() self.ctx.rotate(rot) self.ctx.scale(scale, scale) destx, desty = self.ctx.device_to_user_distance(pt[0], pt[1]) self.ctx.set_source_surface(source, destx-sourcepos[0], desty-sourcepos[1]) self.ctx.rectangle(destx, desty, source.get_width(), source.get_height()) self.ctx.fill() self.ctx.restore() def draw_polygon(self, clr, points): """ Draw a polygon Parameters: clr ....... color in rgb ((r), (g), (b)) points .... polygon points in normal (x,y) positions Return: - """ clr = tools.rgb2floats(clr) self.ctx.set_source_rgb(clr[0], clr[1], clr[2]) pt = points[0] self.ctx.move_to(pt[0], pt[1]) for pt in points[1:]: self.ctx.line_to(pt[0], pt[1]) self.ctx.fill() def draw_text(self, text, center, clr=(0,0,0), size=12, fontname="Georgia"): clr = tools.rgb2floats(clr) self.ctx.set_source_rgb(clr[0], clr[1], clr[2]) self.ctx.select_font_face(fontname, self.cairo.FONT_SLANT_NORMAL, self.cairo.FONT_WEIGHT_NORMAL) self.ctx.set_font_size(size) x_bearing, y_bearing, width, height = self.ctx.text_extents(text)[:4] self.ctx.move_to(center[0] + 0.5 - width / 2 - x_bearing, center[1] + 0.5 - height / 2 - y_bearing) self.ctx.show_text(text) def draw_lines(self, clr, closed, points): """ Draw a polygon Parameters: clr ....... color in rgb ((r), (g), (b)) closed .... whether or not to close the lines (as a polygon) points .... polygon points in normal (x,y) positions Return: - """ clr = tools.rgb2floats(clr) self.ctx.set_source_rgb(clr[0], clr[1], clr[2]) pt = points[0] self.ctx.move_to(pt[0], pt[1]) for pt in points[1:]: self.ctx.line_to(pt[0], pt[1]) if closed: pt = points[0] self.ctx.line_to(pt[0], pt[1]) self.ctx.stroke() class draw_opengl_pyglet(object): """ This class handles the drawing with pyglet """ lineWidth = 0 def __init__(self): """ Load pyglet.gl, and reference it for the drawing methods Parameters: surface .... not used with pyglet lineWidth .. """ print "* OpenGL_Pyglet selected as renderer" from pyglet import gl self.gl = gl def set_lineWidth(self, lw): self.lineWidth = lw def draw_circle(self, clr, pt, radius, a=0): clr = tools.rgb2floats(clr) self.gl.glColor3f(clr[0], clr[1], clr[2]) x, y = pt segs = 15 coef = 2.0*pi/segs; self.gl.glBegin(self.gl.GL_LINE_LOOP) for n in range(segs): rads = n*coef self.gl.glVertex2f(radius*cos(rads + a) + x, radius*sin(rads + a) + y) self.gl.glVertex2f(x,y) self.gl.glEnd() def draw_polygon(self, clr, points): clr = tools.rgb2floats(clr) self.gl.glColor3f(clr[0], clr[1], clr[2]) self.gl.glBegin(self.gl.GL_LINES) p1 = points[0] for p in points[1:]: x1, y1 = p1 x2, y2 = p1 = p self.gl.glVertex2f(x1, y1) self.gl.glVertex2f(x2, y2) x1, y1 = points[0] self.gl.glVertex2f(x2, y2) self.gl.glVertex2f(x1, y1) self.gl.glEnd() def draw_lines(self, clr, closed, points): pass def start_drawing(self): pass def after_drawing(self): pass