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BF: Out should be varying and alpha is not passed to shader #300

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merged 1 commit into from Aug 22, 2020
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BF: Out should be varying and alpha is not passed to shader #300

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9 changes: 2 additions & 7 deletions docs/tutorials/04_shaders/viz_shader.py
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Expand Up @@ -51,15 +51,15 @@
fragment_shader_code_decl = \
"""
uniform float time;
out vec4 myVertexVC;
varying vec4 myVertexVC;
"""

fragment_shader_code_impl = \
"""
vec2 iResolution = vec2(1024,720);
vec2 uv = myVertexVC.xy/iResolution;
vec3 col = 0.5 + 0.5 * cos((time/30) + uv.xyx + vec3(0, 2, 4));
fragOutput0 = vec4(col, 1.0);
fragOutput0 = vec4(col, fragOutput0.a);
"""

shader_to_actor(utah, "vertex", impl_code=vertex_shader_code_impl,
Expand Down Expand Up @@ -108,11 +108,6 @@ def shader_callback(_caller, _event, calldata=None):
tb = ui.TextBlock2D()
tb.message = "Hello Shaders"

###############################################################################
# Change the property of the actor

utah.GetProperty().SetOpacity(0.5)

###############################################################################
# Show Manager
#
Expand Down