2ce8b01c59
This simplifies python code.
When we call a method like shader.uniform_float("color", (1,1,1,1)),
we expect the shader's uniform to be updated regardless of whether the
shader is bound or not.
And `batch.draw()` already calls `GPU_shader_bind` inside.
Differential Revision: https://developer.blender.org/D15929
51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
"""
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Triangle with Custom Shader
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---------------------------
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"""
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import bpy
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import gpu
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from gpu_extras.batch import batch_for_shader
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vert_out = gpu.types.GPUStageInterfaceInfo("my_interface")
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vert_out.smooth('VEC3', "pos")
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shader_info = gpu.types.GPUShaderCreateInfo()
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shader_info.push_constant('MAT4', "viewProjectionMatrix")
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shader_info.push_constant('FLOAT', "brightness")
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shader_info.vertex_in(0, 'VEC3', "position")
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shader_info.vertex_out(vert_out)
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shader_info.fragment_out(0, 'VEC4', "FragColor")
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shader_info.vertex_source(
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"void main()"
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"{"
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" pos = position;"
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" gl_Position = viewProjectionMatrix * vec4(position, 1.0f);"
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"}"
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)
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shader_info.fragment_source(
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"void main()"
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"{"
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" FragColor = vec4(pos * brightness, 1.0);"
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"}"
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)
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shader = gpu.shader.create_from_info(shader_info)
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del vert_out
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del shader_info
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coords = [(1, 1, 1), (2, 0, 0), (-2, -1, 3)]
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batch = batch_for_shader(shader, 'TRIS', {"position": coords})
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def draw():
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matrix = bpy.context.region_data.perspective_matrix
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shader.uniform_float("viewProjectionMatrix", matrix)
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shader.uniform_float("brightness", 0.5)
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batch.draw(shader)
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bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_VIEW')
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