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Moving more OpenGL stuff into separate pyx files.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| def clear_gl_errors(): | ||
| """ | ||
| Clears any previous OpenGL errors. | ||
| """ | ||
|
|
||
| while glGetError() != GL_NO_ERROR: | ||
| pass | ||
|
|
||
| def print_gl_errors(msg): | ||
| """ | ||
| Prints all OpenGL errors using given message. | ||
| """ | ||
|
|
||
| while True: | ||
| err = glGetError() | ||
| if err == GL_NO_ERROR: | ||
| return | ||
| if err == GL_INVALID_ENUM: | ||
| k = "GL_INVALID_ENUM" | ||
| elif err == GL_INVALID_VALUE: | ||
| k = "GL_INVALID_VALUE" | ||
| elif err == GL_INVALID_OPERATION: | ||
| k = "GL_INVALID_OPERATION" | ||
| elif err == GL_INVALID_FRAMEBUFFER_OPERATION: | ||
| k = "GL_INVALID_FRAMEBUFFER_OPERATION" | ||
| else: | ||
| k = "GL_ENUM 0x%x" % err | ||
| print("Error %s in %s" % (k, msg)) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| def get_gl_string(string): | ||
| cdef const char* str | ||
| gl_string_enums = { | ||
| 'GL_VENDOR': GL_VENDOR, | ||
| 'GL_RENDERER': GL_RENDERER, | ||
| 'GL_VERSION': GL_VERSION, | ||
| 'GL_EXTENSIONS': GL_EXTENSIONS, | ||
| 'GL_SHADING_LANGUAGE_VERSION': GL_SHADING_LANGUAGE_VERSION} | ||
| if not glGetString(GL_VERSION): | ||
| raise RuntimeError( | ||
| 'GL strings not available - is there a current OpenGL context?') | ||
| if string not in gl_string_enums: | ||
| raise ValueError( | ||
| "Invalid GL string. Must be one of %s." % ', '.join( | ||
| [ "'%s'" % k for k in sorted(gl_string_enums.keys()) ])) | ||
| str = <const char*>glGetString(gl_string_enums[string]) | ||
| return str.decode('ascii') if str else 'undefined' |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| def cyglSetStandardLighting(): | ||
| """ | ||
| Sets up our default OpenGL environment. | ||
| """ | ||
|
|
||
| # Lighting intensities and location | ||
| cdef GLfloat* ambient = [0.75, 0.75, 0.75, 1.0] | ||
| cdef GLfloat* lightdiffuse = [0.8, 0.8, 0.8, 1.0] | ||
| cdef GLfloat* lightspecular = [0.3, 0.3, 0.3, 1.0] | ||
| # 2 units from the center, up and to the right | ||
| # we should be able to control the light | ||
| cdef GLfloat* lightposition0 = [0.3, 0.5, 3.0, 1.0] | ||
| cdef GLfloat* lightposition1 = [0.3, -0.5, -3.0, 1.0] | ||
|
|
||
| ## Set parameters that apply to all objects: | ||
| # Remove hidden stuff | ||
| glEnable(GL_DEPTH_TEST) | ||
| # Allow transparency | ||
| # glEnable(GL_ALPHA_TEST) | ||
| glEnable(GL_BLEND) | ||
| glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) | ||
| # Enable anti-aliasing of points lines and polygons | ||
| glEnable(GL_POINT_SMOOTH) | ||
| glEnable(GL_LINE_SMOOTH) | ||
| #Below call is deprecated and causes odd behavior on some systems. | ||
| #glEnable(GL_POLYGON_SMOOTH) | ||
| # Use lights and materials to determine colors | ||
| glEnable(GL_LIGHTING) | ||
| # Make the Color command control ambient and diffuse material colors | ||
| glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE) | ||
| glEnable(GL_COLOR_MATERIAL) | ||
| # Use interpolated shading (although colors are constant on faces) | ||
| glShadeModel(GL_SMOOTH) | ||
| # Define the counter-clockwise (outer) face to be the front. | ||
| glFrontFace(GL_CCW) | ||
| # Rasterize front and back Faces | ||
| glDisable(GL_CULL_FACE) | ||
| ## Set up lighting | ||
| # Allow different properties on fronts and backs | ||
| glLightModelf(GL_LIGHT_MODEL_TWO_SIDE, 1.0) | ||
| # Compute specular reflections from the eye | ||
| glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, True) | ||
| # Ambient light intensity for the entire scene | ||
| glLightModelfv(GL_LIGHT_MODEL_AMBIENT, ambient) | ||
| # Enable two lights, with attenuation | ||
| glEnable(GL_LIGHT0) | ||
| glLightfv(GL_LIGHT0, GL_POSITION, lightposition0) | ||
| glLightfv(GL_LIGHT0, GL_DIFFUSE, lightdiffuse) | ||
| glLightfv(GL_LIGHT0, GL_SPECULAR, lightspecular) | ||
| glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 1.0) | ||
| glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.1) | ||
| glLightf(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, 0.08) | ||
| glDisable(GL_LIGHT1) | ||
| glLightfv(GL_LIGHT1, GL_POSITION, lightposition1) | ||
| glLightfv(GL_LIGHT1, GL_DIFFUSE, lightdiffuse) | ||
| glLightfv(GL_LIGHT1, GL_SPECULAR, lightspecular) | ||
| glLightf(GL_LIGHT1, GL_CONSTANT_ATTENUATION, 1.0) | ||
| glLightf(GL_LIGHT1, GL_LINEAR_ATTENUATION, 0.1) | ||
| glLightf(GL_LIGHT1, GL_QUADRATIC_ATTENUATION, 0.08) | ||
| # Use the Model View Matrix | ||
| glMatrixMode(GL_MODELVIEW) | ||
| glLoadIdentity() |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| cdef class vector3: | ||
| """ | ||
| A simple real 3-dimensional vector which supports addition, | ||
| subtraction and right multiplication or division by scalars. | ||
| Attributes include its norm and the square of its norm. | ||
| """ | ||
| cdef readonly double x, y, z, norm_squared, norm | ||
|
|
||
| def __cinit__(self, triple): | ||
| self.x, self.y, self.z = triple | ||
| self.norm_squared = self.x*self.x + self.y*self.y + self.z*self.z | ||
| self.norm = sqrt(self.norm_squared) | ||
|
|
||
| def __repr__(self): | ||
| """ | ||
| >>> vector3( (0, 1, 2) ) | ||
| < 0.0, 1.0, 2.0 > | ||
| """ | ||
| return '< %s, %s, %s >'%(self.x, self.y, self.z) | ||
|
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| def __add__(self, vector): | ||
| return vector3([self.x+vector.x, self.y+vector.y, self.z+vector.z]) | ||
|
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| def __sub__(self, vector): | ||
| return vector3([self.x-vector.x, self.y-vector.y, self.z-vector.z]) | ||
|
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| def __mul__(self, scalar): | ||
| return vector3([self.x*scalar, self.y*scalar, self.z*scalar]) | ||
|
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| def __div__(self, scalar): | ||
| return vector3([self.x/scalar, self.y/scalar, self.z/scalar]) | ||
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| def __truediv__(self, scalar): | ||
| return vector3([self.x/scalar, self.y/scalar, self.z/scalar]) |