This code renders a colored triangle when there is no anti-aliasing (samples=0). But when I turn on anti-aliasing (samples=1...32) it can't render anything. How to make it work with anti-aliasing?
Perhaps I cannot read pixels from multisample fbos or textures directly but I don't know how to fix that.
import numpy as np
from PIL import Image
import moderngl
ctx = moderngl.create_standalone_context(backend='egl')
fbo = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=2),
depth_attachment=ctx.depth_texture((512, 512), samples=2)
)
fbo.use()
vertices = np.array([
-1.0, -1.0, 1.0, 0.0, 0.0,
1.0, -1.0, 0.0, 1.0, 0.0,
0.0, 1.0, 0.0, 0.0, 1.0],
dtype='f4',
)
prog = ctx.program(vertex_shader="""
#version 330
in vec2 in_vert;
in vec3 in_color;
out vec3 color;
void main() {
gl_Position = vec4(in_vert, 0.0, 1.0);
color = in_color;
}
""",
fragment_shader="""
#version 330
out vec4 fragColor;
in vec3 color;
void main() {
fragColor = vec4(color, 1.0);
}
""",
)
vao = ctx.simple_vertex_array(prog, ctx.buffer(vertices), 'in_vert', 'in_color')
vao.render(mode=moderngl.TRIANGLES)
image = Image.frombytes('RGBA', (512, 512), fbo.read(components=4))
image = image.transpose(Image.FLIP_TOP_BOTTOM)
image.save('triangle.png', format='png')
It is not possible to read data from a multisample framebuffer directly. Note, in a multisample framebuffer the pixels are stored for each sample. The color for each sample has to be mixed to a single color. That can be achieved by glBlitFramebuffer.
Create 2 framebuffers. Create a framebuffer with samples=0, this framebuffer is used to read the pixel data. Create a mutlisample framebuffer, which is the target of the rendering.
fbo = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=0),
)
fbo_msaa = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=8),
)
Copy the pixel data from the multisample framebuffer to the single sample framebuffer. I have not found any ModernGL class or method which provides that.
Anyway the multisample framebuffer has to be bound for reading and the single sample framebuffer has to be bound for writing and the color data has to be copied. In native OpenGL this looks as follows:
gl.glBindFramebuffer(gl.GL_READ_FRAMEBUFFER, fbo_msaa.glo)
gl.glBindFramebuffer(gl.GL_DRAW_FRAMEBUFFER, fbo.glo)
gl.glBlitFramebuffer(0, 0, 512, 512, 0, 0, 512, 512, gl.GL_COLOR_BUFFER_BIT, gl.GL_LINEAR)
All together:
import numpy as np
from PIL import Image
import moderngl
import OpenGL.GL as gl
ctx = moderngl.create_standalone_context(backend='egl')
fbo = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=0)
)
fbo_msaa = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=8)
)
fbo_msaa.use()
vertices = np.array([
-1.0, -1.0, 1.0, 0.0, 0.0,
1.0, -1.0, 0.0, 1.0, 0.0,
0.0, 1.0, 0.0, 0.0, 1.0],
dtype='f4',
)
prog = ctx.program(vertex_shader="""
#version 330
in vec2 in_vert;
in vec3 in_color;
out vec3 color;
void main() {
gl_Position = vec4(in_vert, 0.0, 1.0);
color = in_color;
}
""",
fragment_shader="""
#version 330
out vec4 fragColor;
in vec3 color;
void main() {
fragColor = vec4(color, 1.0);
}
""",
)
vao = ctx.simple_vertex_array(prog, ctx.buffer(vertices), 'in_vert', 'in_color')
vao.render(mode=moderngl.TRIANGLES)
gl.glBindFramebuffer(gl.GL_READ_FRAMEBUFFER, fbo_msaa.glo)
gl.glBindFramebuffer(gl.GL_DRAW_FRAMEBUFFER, fbo.glo)
gl.glBlitFramebuffer(0, 0, 512, 512, 0, 0, 512, 512, gl.GL_COLOR_BUFFER_BIT, gl.GL_LINEAR)
image = Image.frombytes('RGBA', (512, 512), fbo.read(components=4))
image = image.transpose(Image.FLIP_TOP_BOTTOM)
image.save('triangle.png', format='png')
Sadly I encountered a new issue. If the multisampe framebuffer has a depth buffer, too, then glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_msaa.glo) fails, for whatever reason.
This needs to be investigated further.
Edit:
I just figured out, that there is not any issue, when using a Renderbuffer rather than a Texture for the depth buffer:
fbo = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=0),
)
fbo_msaa = ctx.framebuffer(
color_attachments=ctx.texture((512, 512), 4, samples=8),
depth_attachment=ctx.depth_renderbuffer((512, 512), samples=8)
)
Hence, it seams to be a bug in ModernGL, related to multisample texture depth buffer attachment.
Related
Im working on my little project and here is some code:
Quad definitions:
#Geometry definitions XYZ UV
quad_vertices = [-0.5, -0.5, 0.0, 0.0, 0.0,
0.5, -0.5, 0.0, 1.0, 0.0,
0.5, 0.5, 0.0, 1.0, 1.0,
-0.5, 0.5, 0.0, 0.0, 1.0]
quad_indices = [0, 1, 2, 2, 3, 0]
quad_vertices = np.array(quad_vertices, dtype=np.float32)
quad_indices = np.array(quad_indices, dtype=np.uint32)
Shader definition:
vertex_src2 = """
# version 330 core
layout(location = 0) in vec3 a_position;
layout(location = 1) in vec2 a_texture_uv;
layout(location = 2) in vec4 a_color;
layout(location = 3) in vec3 translation;
layout(location = 4) in vec3 scale;
layout(location = 5) in vec2 a_tex_index;
layout(location = 6) in vec4 a_effect_params; //currently not used
uniform mat4 projection;
uniform mat4 view;
out vec4 v_color;
out vec2 v_texture;
out float z_texture0;
out float z_texture1;
out vec4 effect_params;
mat4 BuildTranslation(vec3 delta)
{
return mat4(1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
delta, 1.0);
}
mat4 BuildRotation(vec3 delta){
return mat4(cos(radians(delta[2])), -sin(radians(delta[2])), 0.0, 0.0,
sin(radians(delta[2])), cos(radians(delta[2])), 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0);
}
mat4 BuildScale(vec3 delta){
return mat4(delta[0], 0.0, 0.0, 0.0,
0.0, delta[1], 0.0, 0.0,
0.0, 0.0, delta[2], 0.0,
0.0, 0.0, 0.0, 1.0);
}
void main()
{
mat4 model = BuildTranslation(translation) * BuildScale(scale);
gl_Position = projection * view * model * vec4(a_position, 1.0f);
v_texture = a_texture_uv;
v_color = a_color;
z_texture0 = a_tex_index.x;
z_texture1 = a_tex_index.y;
effect_params = vec4(0);
}
"""
#Fragment shader definition
fragment_src2 = """
# version 330 core
in vec4 v_color;
in vec2 v_texture;
in float z_texture0;
in float z_texture1;
in vec4 effect_params;
out vec4 out_color;
uniform int switcher;
uniform sampler2DArray s_texture;
void main()
{
if (switcher == 0){
float effectNo = effect_params[3];
vec4 texel = texture(s_texture, vec3(v_texture, z_texture0));
texel.a = texel.a * v_color.a;
if (texel.a < 0.05){
discard;
}
out_color = texel;
}
}
"""
Here are the bindings:
def bind_buffer_data(self):
glBindVertexArray(self.VAO)
glBindBuffer(GL_ARRAY_BUFFER, self.VBO[0])
glBufferData(GL_ARRAY_BUFFER, quad_vertices.nbytes, quad_vertices, GL_STATIC_DRAW)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.EBO)
glBufferData(GL_ELEMENT_ARRAY_BUFFER, quad_indices.nbytes, quad_indices, GL_STATIC_DRAW)
for i in range(6):
glEnableVertexAttribArray(i)
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 20, ctypes.c_void_p(0))
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 20, ctypes.c_void_p(12))
glBindBuffer(GL_ARRAY_BUFFER, self.VBO[1]) // This is bound for later loading of buffer data during draw_object()
Final bindings and drawing:
def draw_object(self, depth, alpha=1.0, switcher=0):
self.color[3] = alpha
buffer_data = np.array(
[self.color[0], self.color[1], self.color[2], self.color[3],
self.pos_x, self.pos_y, depth,
self.scale[0], self.scale[1], self.scale[2],
0, 0],
dtype=np.float32)
glBindVertexArray(self.VAO)
glBindTexture(GL_TEXTURE_2D_ARRAY, self.get_current_texture())
glBufferData(GL_ARRAY_BUFFER, buffer_data.nbytes, buffer_data, GL_DYNAMIC_DRAW)
glVertexAttribPointer(2, 4, GL_FLOAT, GL_FALSE, 48, ctypes.c_void_p(0))
glVertexAttribDivisor(2, 1) #Cannot delete that?
glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, 48, ctypes.c_void_p(16))
glVertexAttribDivisor(3, 1) #Cannot delete that?
glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, 48, ctypes.c_void_p(28))
glVertexAttribDivisor(4, 1) #Cannot delete that?
glVertexAttribPointer(5, 2, GL_FLOAT, GL_FALSE, 48, ctypes.c_void_p(40))
glVertexAttribDivisor(5, 1) #Cannot delete that?
glUniform1i(shader.switcher_loc2, switcher)
glDrawElements(GL_TRIANGLES, len(quad_indices), GL_UNSIGNED_INT, None)
I'm very puzzled because above code works and everything renders properly. However as soon as I remove glVertexAttribDivisor lines it doesn't render anything. Any ideas why this is the case?
Note that I'm using glDrawElements not glDrawElementsInstanced. I thought that glDrawElements is not even looking at glVertexAttribDivisor because I'm drawing single primitive. Could it have something to do with the fact that I bound 2 different VBO's to GL_ARRAY_BUFFER target? But then... I'm calling glVertexAttribPointer function only when proper VBO is bound to the VAO as well as glBufferData, so I don't understand. Please help me understand this better.
So the misconception I had was that I thought that glDrawElements is going to draw me a single instance of a given primitive (quad in my case) using same attributes it was given from buffer for each individual vertex. That is not the case!
Without glVertexAttribDivisor only the first vertex out of 4 will get correct attributes and all the rest of them will get 0,0,0,0,0.... So if I double the buffer size in this case, half of them will get the data and something will render but garbage. With quadruple size of the given buffer everything renders as it should.
So my lesson to take away from this is that without vertexAttribDivisor specified, the attributes are going to be read from buffer as stride per vertex not per whole instance.
I'm considering switching to ModernGL over PyOpenGL, and I'm struggling to implement anything right now.
First of all, I would like to try the classic "triangle that changes shape using a time uniform and sine function", but I'm stuck on how to write to the uniform.
Here is what the documentation says about this:
A uniform is a global GLSL variable declared with the “uniform” storage qualifier. These act as
parameters that the user of a shader program can pass to that program.
In ModernGL, Uniforms can be accessed using Program.__getitem__() or Program.__iter__().
# Set a vec4 uniform
uniform['color'] = 1.0, 1.0, 1.0, 1.0
# Optionally we can store references to a member and set the value directly
uniform = program['color']
uniform.value = 1.0, 0.0, 0.0, 0.0
uniform = program['cameraMatrix']
uniform.write(camera_matrix)
This is my code:
import moderngl as mgl
import glfw
import numpy as np
import time
from math import sin
glfw.init()
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
window = glfw.create_window(800, 600, "__DELETEME__", None, None)
glfw.make_context_current(window)
context = mgl.create_context()
vertex_source = """
#version 330 core
in vec2 aPos;
uniform float time;
void main() {
gl_Position = vec4(aPos.x, aPos.y + sin(time), 0.0, 1.0);
}
"""
fragment_source = """
#version 330 core
out vec4 color;
void main(){
color = vec4(0.0, 0.0, 1.0, 1.0);
}
"""
program = context.program(vertex_shader=vertex_source, fragment_shader=fragment_source)
data = np.array([
0.5, 0,
-0.5, 0,
0, 0.5], dtype = "float32")
vbo = context.buffer(data.tobytes())
vao = context.vertex_array(program, vbo, "aPos")
uniform = program["time"]
uniform.value = 1.0
while not glfw.window_should_close(window):
now = time.time()
vao.render()
elapsed = time.time() - now
glfw.poll_events()
glfw.swap_buffers(window)
glfw.terminate()
Now it draws nothing. What am I doing wrong? Thanks!
The elapsed time is the difference between the start time and the current time. Get the start time before the application loop and compute the elapsed time in the loop in every frame:
start_time = time.time()
while not glfw.window_should_close(window):
elapsed = time.time() - start_time
# [...]
The value of the uniform "time" has to be updated continuously in the loop:
while not glfw.window_should_close(window):
# [...]
uniform.value = elapsed
You have to clear the display in every frame, in the application loop (See ModernGL Context):
while not glfw.window_should_close(window):
# [...]
context.clear(0.0, 0.0, 0.0)
vao.render()
Complete example:
import moderngl as mgl
import glfw
import numpy as np
import time
from math import sin
glfw.init()
glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
window = glfw.create_window(800, 600, "__DELETEME__", None, None)
glfw.make_context_current(window)
context = mgl.create_context()
vertex_source = """
#version 330 core
in vec2 aPos;
uniform float time;
void main() {
gl_Position = vec4(aPos.x, aPos.y + sin(time), 0.0, 1.0);
}
"""
fragment_source = """
#version 330 core
out vec4 color;
void main(){
color = vec4(0.0, 0.0, 1.0, 1.0);
}
"""
program = context.program(vertex_shader=vertex_source, fragment_shader=fragment_source)
data = np.array([
0.5, 0,
-0.5, 0,
0, 0.5], dtype = "float32")
vbo = context.buffer(data.tobytes())
vao = context.vertex_array(program, vbo, "aPos")
uniform = program["time"]
uniform.value = 1.0
start_time = time.time()
while not glfw.window_should_close(window):
elapsed = time.time() - start_time
uniform.value = elapsed
context.clear(0.0, 0.0, 0.0)
vao.render()
glfw.poll_events()
glfw.swap_buffers(window)
glfw.terminate()
I am writing a python application using Kivy for rendering some graphics. I would like to find out how to get access to the current modelview matrix within kivy, the same matrix as in the vertex shader.
Here is my example code (Python 2.7, Kivy 1.9):
#!/usr/bin/env python
from kivy.app import App
from kivy.clock import Clock
from kivy.core.window import Window
from kivy.graphics import *
from kivy.graphics.transformation import Matrix
from kivy.resources import resource_find
from kivy.uix.widget import Widget
vertices = [0.0, 0.0, 0.0, 0.0, 0.0, 1.0,
2.0, 0.0, 0.0, 0.0, 0.0, 1.0,
0.0, 2.0, 0.0, 0.0, 0.0, 1.0,
2.0, 2.0, 0.0, 0.0, 0.0, 1.0]
indices = [0, 1, 2, 1, 2, 3]
vformat = [(b'v_pos', 3, 'float'), (b'v_normal', 3, 'float')]
class Renderer(Widget):
def __init__(self, **kwargs):
super(Renderer, self).__init__(**kwargs)
self.canvas = RenderContext(compute_normal_mat=True)
self.canvas.shader.source = resource_find('simple.glsl')
with self.canvas:
PushMatrix()
Translate(0, -1, -3)
self.rot = Rotate(1, 0, 1, 0)
UpdateNormalMatrix()
self.mesh = Mesh(vertices=vertices, indices=indices,
fmt=vformat, mode='triangles')
PopMatrix()
Clock.schedule_interval(self.update_glsl, 1 / 60.)
def update_glsl(self, delta):
asp = self.width / float(self.height)
proj = Matrix().view_clip(-asp, asp, -1, 1, 1, 100, 1)
self.canvas['projection_mat'] = proj
self.rot.angle += delta * 100
print self.canvas['modelview_mat']
class RendererApp(App):
def build(self):
return Renderer()
if __name__ == "__main__":
RendererApp().run()
and the shader file simple.glsl:
---VERTEX SHADER-----------------------------------
attribute vec3 v_pos;
attribute vec3 v_normal;
uniform mat4 modelview_mat;
uniform mat4 projection_mat;
varying vec4 normal_vec;
void main (void) {
normal_vec = vec4(v_normal, 0.0);
gl_Position = projection_mat * modelview_mat * vec4(v_pos, 1.0);
}
---FRAGMENT SHADER---------------------------------
uniform mat4 normal_mat;
varying vec4 normal_vec;
void main (void){
vec4 v_normal = normalize( normal_mat * normal_vec ) ;
float theta = clamp(abs(dot(v_normal, vec4(0.0, 0.0, 1.0, 1.0))), 0.0, 1.0);
gl_FragColor = vec4(theta, theta, theta, 1.0);
}
In the function update_glsl I need the current modelview matrix for some calculations. I tried self.canvas['modelview_mat'], but this give me always the identity matrix.
I am trying to render an obj (a human body model) to its corresponding silhouette image given camera intrinsic&&extrinsic parameters and I want to know which renderer is suitable for the task. I don't want real time display of the rendered images because efficiency is my top concern. I have 100000 3d objects and i need to write a script to render the silhouette images of those objects in one go.
Here is a small example rendering with OpenGL to an image using ModernGL and Pillow
pillow docs
ModernGL docs
Sample code:
import struct
import ModernGL
from PIL import Image
ctx = ModernGL.create_standalone_context()
prog = ctx.program([
ctx.vertex_shader('''
#version 330
in vec2 vert;
void main() {
gl_Position = vec4(vert, 0.0, 1.0);
}
'''),
ctx.fragment_shader('''
#version 330
out vec4 color;
void main() {
color = vec4(0.3, 0.5, 1.0, 1.0);
}
'''),
])
vbo = ctx.buffer(struct.pack('6f', 0.0, 0.8, -0.6, -0.8, 0.6, -0.8))
vao = ctx.simple_vertex_array(prog, vbo, ['vert'])
fbo = ctx.framebuffer(ctx.renderbuffer((512, 512)))
fbo.use()
ctx.viewport = (0, 0, 512, 512)
ctx.clear(0.9, 0.9, 0.9)
vao.render()
pixels = fbo.read(components=3, alignment=1)
img = Image.frombytes('RGB', fbo.size, pixels).transpose(Image.FLIP_TOP_BOTTOM)
img.show()
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers.
This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 7 years ago.
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I am having trouble passing projection and modelview matrices into the GLSL shader from my PyOpenGL code. My understanding is that OpenGL matrices are column major, but when I pass in projection and modelview matrices as shown, I don't see anything. I tried the transpose of the matrices, and it worked for the modelview matrix, but the projection matrix doesn't work either way. Here is the code:
import OpenGL
from OpenGL.GL import *
from OpenGL.GL.shaders import *
from OpenGL.GLU import *
from OpenGL.GLUT import *
from OpenGL.GLUT.freeglut import *
from OpenGL.arrays import vbo
import numpy, math, sys
strVS = """
attribute vec3 aVert;
uniform mat4 uMVMatrix;
uniform mat4 uPMatrix;
uniform vec4 uColor;
varying vec4 vCol;
void main() {
// option #1 - fails
gl_Position = uPMatrix * uMVMatrix * vec4(aVert, 1.0);
// option #2 - works
gl_Position = vec4(aVert, 1.0);
// set color
vCol = vec4(uColor.rgb, 1.0);
}
"""
strFS = """
varying vec4 vCol;
void main() {
// use vertex color
gl_FragColor = vCol;
}
"""
# 3D scene
class Scene:
# initialization
def __init__(self):
# create shader
self.program = compileProgram(compileShader(strVS,
GL_VERTEX_SHADER),
compileShader(strFS,
GL_FRAGMENT_SHADER))
glUseProgram(self.program)
self.pMatrixUniform = glGetUniformLocation(self.program, 'uPMatrix')
self.mvMatrixUniform = glGetUniformLocation(self.program,
"uMVMatrix")
self.colorU = glGetUniformLocation(self.program, "uColor")
# attributes
self.vertIndex = glGetAttribLocation(self.program, "aVert")
# color
self.col0 = [1.0, 1.0, 0.0, 1.0]
# define quad vertices
s = 0.2
quadV = [
-s, s, 0.0,
-s, -s, 0.0,
s, s, 0.0,
s, s, 0.0,
-s, -s, 0.0,
s, -s, 0.0
]
# vertices
self.vertexBuffer = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.vertexBuffer)
vertexData = numpy.array(quadV, numpy.float32)
glBufferData(GL_ARRAY_BUFFER, 4*len(vertexData), vertexData,
GL_STATIC_DRAW)
# render
def render(self, pMatrix, mvMatrix):
# use shader
glUseProgram(self.program)
# set proj matrix
glUniformMatrix4fv(self.pMatrixUniform, 1, GL_FALSE, pMatrix)
# set modelview matrix
glUniformMatrix4fv(self.mvMatrixUniform, 1, GL_FALSE, mvMatrix)
# set color
glUniform4fv(self.colorU, 1, self.col0)
#enable arrays
glEnableVertexAttribArray(self.vertIndex)
# set buffers
glBindBuffer(GL_ARRAY_BUFFER, self.vertexBuffer)
glVertexAttribPointer(self.vertIndex, 3, GL_FLOAT, GL_FALSE, 0, None)
# draw
glDrawArrays(GL_TRIANGLES, 0, 6)
# disable arrays
glDisableVertexAttribArray(self.vertIndex)
class Renderer:
def __init__(self):
pass
def reshape(self, width, height):
self.width = width
self.height = height
self.aspect = width/float(height)
glViewport(0, 0, self.width, self.height)
glEnable(GL_DEPTH_TEST)
glDisable(GL_CULL_FACE)
glClearColor(0.8, 0.8, 0.8,1.0)
glutPostRedisplay()
def keyPressed(self, *args):
sys.exit()
def draw(self):
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
# build projection matrix
fov = math.radians(45.0)
f = 1.0/math.tan(fov/2.0)
zN, zF = (0.1, 100.0)
a = self.aspect
pMatrix = numpy.array([f/a, 0.0, 0.0, 0.0,
0.0, f, 0.0, 0.0,
0.0, 0.0, (zF+zN)/(zN-zF), -1.0,
0.0, 0.0, 2.0*zF*zN/(zN-zF), 0.0], numpy.float32)
# modelview matrix
mvMatrix = numpy.array([1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.5, 0.0, -5.0, 1.0], numpy.float32)
# render
self.scene.render(pMatrix, mvMatrix)
# swap buffers
glutSwapBuffers()
def run(self):
glutInitDisplayMode(GLUT_RGBA)
glutInitWindowSize(400, 400)
self.window = glutCreateWindow("Minimal")
glutReshapeFunc(self.reshape)
glutDisplayFunc(self.draw)
glutKeyboardFunc(self.keyPressed) # Checks for key strokes
self.scene = Scene()
glutMainLoop()
glutInit(sys.argv)
prog = Renderer()
prog.run()
When I use option #2 in the shader without either matrix, I get the following output:
What am I doing wrong?