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pyRender.py
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/
pyRender.py
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import objectReader as obr
import numpy as np
import math as math
import pygame
from pygame import gfxdraw
angles = [0, .1, math.pi]
camera = [0, 0, 0]
surface = [0, 0, 1]
gfxSurface = pygame.display.set_mode((640, 480))
qt = math.pi / 2
ht = math.pi
screen = [0, 0]
def init(scrn, surface):
global screen
global gfxSurface
screen = scrn
gfxSurface = surface
def initCamera(pos, fov):
global camera
global surface
camera = pos
surface[2] = 1 / math.tan(fov / 2)
def rotate(x, y, z):
global angles
delta_a = [x, y, z]
for a in range(3):
angles[a] = angles[a] + delta_a[a]
def moveCamera(x, z, y):
global camera
global angles
camera[0] = camera[0] - math.sin(angles[1])*z
camera[0] = camera[0] - math.cos(angles[1])*x
camera[2] = camera[2] + math.cos(angles[1])*z
camera[2] = camera[2] - math.sin(angles[1])*x
camera[1] = camera[1] + y
def setAngle(ang):
global angles
angles = ang
def getVector(point):
global angles
global camera
pos = [0, 0, 0]
vector = [0, 0, 0]
for p in range(3):
pos[p] = point[p] - camera[p]
m1 = [[1, 0, 0],[0, math.cos(angles[0]), math.sin(angles[0])], [0, -math.sin(angles[0]), math.cos(angles[0])]]
m2 = [[math.cos(angles[1]), 0, -math.sin(angles[1])], [0, 1, 0], [math.sin(angles[1]), 0, math.cos(angles[1])]]
m3 = [[math.cos(angles[2]), math.sin(angles[2]), 0], [-math.sin(angles[2]), math.cos(angles[2]), 0], [0, 0, 1]]
vector = np.matmul(np.matmul(np.matmul(m1, m2), m3), pos)
return vector
def getProjectionMatrix(near, far, left, right, top, bottom):
return [[(2*near)/(right - left), 0, (right + left)/(right - left), 0], [0, (2*near)/(top - bottom), (top + bottom)/(top - bottom), 0], [0, 0, (far+ + near)/(near - far), (2*far*near)/(near - far)], [0, 0, -1, 0]]
def getSimplifiedProjectionMatrix(near, far, right, top):
return [[near/right, 0, 0, 0], [0, near/top, 0, 0], [0, 0, (far + near)/(near-far), (2*far*near)/(near-far)], [0, 0, -1, 0]]
def getCoords(vector):
global surface
s1 = [[1, 0, (surface[0] / surface[2])], [0, 1, (surface[1] / surface[2])], [0, 0, (1 / surface[2])]]
f = np.matmul(s1, vector)
b = [f[0]/f[2],f[1]/f[2], (f[2] > .25)]
return b
def getPoint(point):
global screen
p = getCoords(getVector(point))
w = math.floor(screen[0] / 2)
h = math.floor(screen[1] / 2)
p[0] = (p[0]*w) + w
p[1] = (p[1]*h) + h
for i in range(2):
p[i] = math.floor(p[i])
return p
def drawPoint(point, color):
global gfxSurface
b = getPoint(point)
x, y = [b[i] for i in [0,1]]
if b[2] == 1:
gfxdraw.pixel(gfxSurface, x + math.floor(screen[0] / 2), y + math.floor(screen[1] / 2), color)
def drawLine(point1, point2, color):
global gfxSurface
global screen
b1 = getPoint(point1)
b2 = getPoint(point2)
w = math.floor(screen[0] / 2)
h = math.floor(screen[1] / 2)
x1, y1 = [b1[i] for i in [0,1]]
x2, y2 = [b2[i] for i in [0,1]]
if b1[2] == 1 and b2[2] == 1:
gfxdraw.line(gfxSurface, x1, y1, x2, y2, color)
def transformCenter(center, x, y, z):
return [center[0] + x, center[1] + y, center[2] + z]
def transformCoords(base, change):
return [base[0] + change[0], base[1] + change[1], base[2] + change[2]]
def applyScalar(coord, scalar):
for i in range(3):
coord[i] = coord[i] * scalar
return coord
def resizeVertices(vertices, scale):
for i in range(len(vertices) - 1):
for j in range(3):
vertices[i][j] = vertices[i][j] * scale
return vertices
def drawCube(center, dim, color):
dx = dim[0] / 2
dy = dim[1] / 2
dz = dim[2] / 2
drawLine(transformCenter(center, dx, dy, -dz) , transformCenter(center, dx, dy, dz), color)
drawLine(transformCenter(center, -dx, dy, -dz) , transformCenter(center, -dx, dy, dz), color)
drawLine(transformCenter(center, -dx, dy, dz) , transformCenter(center, dx, dy, dz), color)
drawLine(transformCenter(center, -dx, dy, -dz) , transformCenter(center, dx, dy, -dz), color)
drawLine(transformCenter(center, dx, -dy, -dz) , transformCenter(center, dx, -dy, dz), color)
drawLine(transformCenter(center, -dx, -dy, -dz) , transformCenter(center, -dx, -dy, dz), color)
drawLine(transformCenter(center, -dx, -dy, dz) , transformCenter(center, dx, -dy, dz), color)
drawLine(transformCenter(center, -dx, -dy, -dz) , transformCenter(center, dx, -dy, -dz), color)
drawLine(transformCenter(center, -dx, -dy, -dz) , transformCenter(center, -dx, dy, -dz), color)
drawLine(transformCenter(center, -dx, -dy, dz) , transformCenter(center, -dx, dy, dz), color)
drawLine(transformCenter(center, dx, -dy, -dz) , transformCenter(center, dx, dy, -dz), color)
drawLine(transformCenter(center, dx, -dy, dz) , transformCenter(center, dx, dy, dz), color)
def drawPolygon(origin, numpoints, points, color, filled):
global gfxSurface
points1 = []
noDraw = False
for i in points:
points1.append(getPoint(transformCoords(origin, i)))
if getPoint(transformCoords(origin, i))[2] == 0:
noDraw = True
if filled:
if not noDraw:
gfxdraw.filled_polygon(gfxSurface, points1, color)
if not filled:
if not noDraw:
gfxdraw.polygon(gfxSurface, points1, color)
def handleVertex(origin, vertex1, vertex2, color):
coord1 = [vertex1[0], vertex1[1], vertex1[2]]
coord2 = [vertex2[0], vertex2[1], vertex2[2]]
if vertex2[3] == "vlt":
drawLine(transformCoords(origin, coord1), transformCoords(origin, coord2), color)
def drawObject(pos, scale, fileName, color):
drawVertices(pos, scale, obr.getVertices(fileName + ".obj"), color)
def drawVertices(pos, scale, vertices, color):
vertices.append(next(reversed(vertices)))
vertices = resizeVertices(vertices, scale)
plain = []
poly = []
for i in range(len(vertices) - 1):
if vertices[i][3] == "vpg":
poly.append(vertices[i])
if vertices[i][3] != "vpg":
plain.append(vertices[i])
for i in range(len(plain) - 1):
handleVertex(pos, plain[i], plain[i + 1], color)
if len(poly) > 2:
drawPolygon(pos, len(poly), poly, color, 1)