psychopy.tools.gltools.createMaterial

psychopy.tools.gltools.createMaterial(params=(), textures=(), face=1032)[source]

Create a new material.

Parameters:

  • params (list of tuple, optional) – List of material modes and values. Each mode is assigned a value as (mode, color). Modes can be GL_AMBIENT, GL_DIFFUSE, GL_SPECULAR, GL_EMISSION, GL_SHININESS or GL_AMBIENT_AND_DIFFUSE. Colors must be a tuple of 4 floats which specify reflectance values for each RGBA component. The value of GL_SHININESS should be a single float. If no values are specified, an empty material will be created.

  • textures (list of tuple, optional) – List of texture units and TexImage2D descriptors. These will be written to the ‘textures’ field of the returned descriptor. For example, [(GL.GL_TEXTURE0, texDesc0), (GL.GL_TEXTURE1, texDesc1)]. The number of texture units per-material is GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS.

  • face (int, optional) – Faces to apply material to. Values can be GL_FRONT_AND_BACK, GL_FRONT and GL_BACK. The default is GL_FRONT_AND_BACK.

Returns:

A descriptor with material properties.

Return type:

Material

Examples

Creating a new material with given properties:

# The values for the material below can be found at
# http://devernay.free.fr/cours/opengl/materials.html

# create a gold material
gold = createMaterial([
    (GL.GL_AMBIENT, (0.24725, 0.19950, 0.07450, 1.0)),
    (GL.GL_DIFFUSE, (0.75164, 0.60648, 0.22648, 1.0)),
    (GL.GL_SPECULAR, (0.628281, 0.555802, 0.366065, 1.0)),
    (GL.GL_SHININESS, 0.4 * 128.0)])

Use the material when drawing:

useMaterial(gold)
drawVAO( ... )  # all meshes will be gold
useMaterial(None)  # turn off material when done

Create a red plastic material, but define reflectance and shine later:

red_plastic = createMaterial()

# you need to convert values to ctypes!
red_plastic.values[GL_AMBIENT] = (GLfloat * 4)(0.0, 0.0, 0.0, 1.0)
red_plastic.values[GL_DIFFUSE] = (GLfloat * 4)(0.5, 0.0, 0.0, 1.0)
red_plastic.values[GL_SPECULAR] = (GLfloat * 4)(0.7, 0.6, 0.6, 1.0)
red_plastic.values[GL_SHININESS] = 0.25 * 128.0

# set and draw
useMaterial(red_plastic)
drawVertexbuffers( ... )  # all meshes will be red plastic
useMaterial(None)

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