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comparison pytouhou/opengl/gamerenderer.pyx @ 131:fab7ad2f0d8b

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Use Cython, improve performances!
author Thibaut Girka <thib@sitedethib.com>
date Sun, 11 Sep 2011 02:02:59 +0200
parents pytouhou/opengl/gamerenderer.py@11ab06f4c4c6
children 982b21222602
comparison
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130:11ab06f4c4c6 131:fab7ad2f0d8b
1 # -*- encoding: utf-8 -*-
2 ##
3 ## Copyright (C) 2011 Thibaut Girka <thib@sitedethib.com>
4 ##
5 ## This program is free software; you can redistribute it and/or modify
6 ## it under the terms of the GNU General Public License as published
7 ## by the Free Software Foundation; version 3 only.
8 ##
9 ## This program is distributed in the hope that it will be useful,
10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 ## GNU General Public License for more details.
13 ##
14
15 from libc.stdlib cimport malloc, free
16
17 import ctypes
18
19 import struct
20
21 from pyglet.gl import *
22
23 from pytouhou.opengl.texture import TextureManager
24 from pytouhou.opengl.sprite cimport get_sprite_rendering_data
25 from pytouhou.opengl.background import get_background_rendering_data
26
27
28 MAX_ELEMENTS = 10000
29
30
31 cdef struct Vertex:
32 float x, y, z
33 float u, v
34 unsigned char r, g, b, a
35
36
37 cdef class GameRenderer:
38 cdef public texture_manager
39 cdef public game
40 cdef public background
41
42 cdef Vertex *vertex_buffer
43
44
45 def __cinit__(self, resource_loader, game=None, background=None):
46 # Allocate buffers
47 self.vertex_buffer = <Vertex*> malloc(MAX_ELEMENTS * sizeof(Vertex))
48
49
50 def __dealloc__(self):
51 free(self.vertex_buffer)
52
53
54 def __init__(self, resource_loader, game=None, background=None):
55 self.texture_manager = TextureManager(resource_loader)
56
57 self.game = game
58 self.background = background
59
60
61 cdef render_elements(self, elements):
62 cdef unsigned short nb_vertices = 0
63
64 indices_by_texture = {}
65
66 for element in elements:
67 sprite = element._sprite
68 if sprite:
69 ox, oy = element.x, element.y
70 key, (vertices, uvs, colors) = get_sprite_rendering_data(sprite)
71 rec = indices_by_texture.setdefault(key, [])
72
73 # Pack data in buffer
74 (x1, y1, z1), (x2, y2, z2), (x3, y3, z3), (x4, y4, z4) = vertices
75 r1, g1, b1, a1, r2, g2, b2, a2, r3, g3, b3, a3, r4, g4, b4, a4 = colors
76 u1, v1, u2, v2, u3, v3, u4, v4 = uvs
77 self.vertex_buffer[nb_vertices] = Vertex(x1 + ox, y1 + oy, z1, u1, v1, r1, g1, b1, a1)
78 self.vertex_buffer[nb_vertices+1] = Vertex(x2 + ox, y2 + oy, z2, u2, v2, r2, g2, b2, a2)
79 self.vertex_buffer[nb_vertices+2] = Vertex(x3 + ox, y3 + oy, z3, u3, v3, r3, g3, b3, a3)
80 self.vertex_buffer[nb_vertices+3] = Vertex(x4 + ox, y4 + oy, z4, u4, v4, r4, g4, b4, a4)
81
82 # Add indices
83 index = nb_vertices
84 rec.extend((index, index + 1, index + 2, index + 3))
85
86 nb_vertices += 4
87
88 glVertexPointer(3, GL_FLOAT, 24, <long> &self.vertex_buffer[0].x)
89 glTexCoordPointer(2, GL_FLOAT, 24, <long> &self.vertex_buffer[0].u)
90 glColorPointer(4, GL_UNSIGNED_BYTE, 24, <long> &self.vertex_buffer[0].r)
91
92 for (texture_key, blendfunc), indices in indices_by_texture.items():
93 nb_indices = len(indices)
94 indices = struct.pack(str(nb_indices) + 'H', *indices)
95 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
96 glBindTexture(GL_TEXTURE_2D, self.texture_manager[texture_key].id)
97 glDrawElements(GL_QUADS, nb_indices, GL_UNSIGNED_SHORT, indices)
98
99
100 def render(self):
101 glClear(GL_DEPTH_BUFFER_BIT)
102
103 back = self.background
104 game = self.game
105 texture_manager = self.texture_manager
106
107 if back is not None:
108 fog_b, fog_g, fog_r, fog_start, fog_end = back.fog_interpolator.values
109 x, y, z = back.position_interpolator.values
110 dx, dy, dz = back.position2_interpolator.values
111
112 glFogi(GL_FOG_MODE, GL_LINEAR)
113 glFogf(GL_FOG_START, fog_start)
114 glFogf(GL_FOG_END, fog_end)
115 glFogfv(GL_FOG_COLOR, (GLfloat * 4)(fog_r / 255., fog_g / 255., fog_b / 255., 1.))
116
117 glMatrixMode(GL_MODELVIEW)
118 glLoadIdentity()
119 # Some explanations on the magic constants:
120 # 192. = 384. / 2. = width / 2.
121 # 224. = 448. / 2. = height / 2.
122 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
123 # This is so that objects on the (O, x, y) plane use pixel coordinates
124 gluLookAt(192., 224., - 835.979370 * dz,
125 192. + dx, 224. - dy, 0., 0., -1., 0.)
126 glTranslatef(-x, -y, -z)
127
128 glEnable(GL_DEPTH_TEST)
129 for (texture_key, blendfunc), (nb_vertices, vertices, uvs, colors) in get_background_rendering_data(back):
130 glBlendFunc(GL_SRC_ALPHA, (GL_ONE_MINUS_SRC_ALPHA, GL_ONE)[blendfunc])
131 glBindTexture(GL_TEXTURE_2D, texture_manager[texture_key].id)
132 glVertexPointer(3, GL_FLOAT, 0, vertices)
133 glTexCoordPointer(2, GL_FLOAT, 0, uvs)
134 glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors)
135 glDrawArrays(GL_QUADS, 0, nb_vertices)
136 glDisable(GL_DEPTH_TEST)
137 else:
138 glClear(GL_COLOR_BUFFER_BIT)
139
140 if game is not None:
141 glMatrixMode(GL_MODELVIEW)
142 glLoadIdentity()
143 # Some explanations on the magic constants:
144 # 192. = 384. / 2. = width / 2.
145 # 224. = 448. / 2. = height / 2.
146 # 835.979370 = 224./math.tan(math.radians(15)) = (height/2.)/math.tan(math.radians(fov/2))
147 # This is so that objects on the (O, x, y) plane use pixel coordinates
148 gluLookAt(192., 224., - 835.979370,
149 192., 224., 0., 0., -1., 0.)
150
151 glDisable(GL_FOG)
152 self.render_elements(game.enemies)
153 self.render_elements(game.game_state.bullets)
154 self.render_elements(game.players)
155 glEnable(GL_FOG)
156