/[gzz]/gzz/gfx/demo/irregu3.py
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revision 1.34 by jvk, Tue Oct 29 17:36:53 2002 UTC revision 1.35 by jvk, Wed Oct 30 15:42:39 2002 UTC
# Line 17  matrices = [ "1 0 0 0  0 1 0 0  0 0 1 0 Line 17  matrices = [ "1 0 0 0  0 1 0 0  0 0 1 0
17  profiles = []  profiles = []
18    
19    
20    if (GL.hasExtension("GL_NV_fragment_program")):
21        profiles.append("NV_PROG")
22    
23  if (GL.hasExtension("GL_NV_texture_shader")):  if (GL.hasExtension("GL_NV_texture_shader")):
24      profiles.append("NV_SHAD")      profiles.append("NV_SHAD")
25    
# Line 58  def init(profile): Line 61  def init(profile):
61      using_shader = 0      using_shader = 0
62      using_secondary_color = 0      using_secondary_color = 0
63      using_multitex = 0      using_multitex = 0
64    
65        if profile == "NV_PROG":
66            code = """!FP1.0;
67            # Compute one pixel difference of texcoords in R0
68            DDX R0, f[TEX0];
69            DDY R1, f[TEX0];
70            MUL R0, R0, R0;
71            MAD R0, R1, R1;
72            RSQ R1.x, R0.x;
73            RSQ R1.y, R0.y;
74            MUL R0, R1;
75    
76            # Compute texcoord +/- 1 pixel
77            ADD R1, f[TEX0], R0;
78            ADD R2, f[TEX0], -R0;
79    
80            # Compute texcoord +/- 2 pixels
81            ADD R3, R1, R0;
82            ADD R4, R2, -R0;
83    
84            # Read texture
85            TEX R0, R0, TEX0, 2D;
86            TEX R1, R1, TEX0, 2D;
87            TEX R2, R2, TEX0, 2D;
88            TEX R3, R3, TEX0, 2D;
89            TEX R4, R4, TEX0, 2D;
90    
91            # Add c * sqrt(1 - r^2)
92            ...
93            
94            # Take maximum
95            ...
96            
97            """
98            
99      if profile == "NV_SHAD":      if profile == "NV_SHAD":
100          print "Using 2-vector HILO displacement texture with GL_NV_texture_shader"          print "Using 2-vector HILO displacement texture with GL_NV_texture_shader"

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