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Since you have the matrixes separate like that, it might be helpful to show us the value of each matrix. Working in typescript and have a Mat4 class to make type checking easier, which is basically just a Float32Array(16) with assessors. This mistake never would have happened if you just stuck with gl-matrix and used mat4.translate().
I made a mistake in the update, I put the view matrix in the wrong order, and I was specifically checking the values of that matrix today. I found out where I was going wrong with my implementation, it was with the matrix multiplication, instead of multiplying A * B, I needed to calculate (A * B)T which is equal to BT * AT. Edit: What had confused me was that the gl-matrix library had calculated the dot product for the columns of matrix b against the rows of matrix a. Not the answer you're looking for?Browse other questions tagged matrix 3d rotation webgl or ask your own question. In a business where staff churn is costly, should I let employees lead and request their salary increase?
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I currently am trying to do ray casting based on my mouse position which will then later be used to determine where it intersects my object.
In the image above, the orange line represents my new ray and the green circle is where my cursor is. Supposedly what should appear on my screen is a dot, since the projected line from my click would be going into the screen at the same angle. To prove that my lines were parallel, I saved my original vector and my new one, plotting them, then rotating to view where they were. Would it be rude to ask a famous professor who doesn't know me personally for a recommendation letter if I have published in a high ranking journal?


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As you can see in the pictures, the shadow have these horrible "acne" and i don know how to avoid it. Not the answer you're looking for?Browse other questions tagged opengl shadows shadow-mapping or ask your own question.
I found some code online which will move a box across the screen, then reset it after the box hits the end of the screen. How is the state of that translation recorded if i just pop the matrix off again after making the change? In the wheel example, you have only one wheel geometry but because you are using different matrices, there will be four wheels drawn. So to reemphase this: OpenGL does not do any kind of scene management, it just draws things to the framebuffer in the order and way you issue the drawing commands. Not the answer you're looking for?Browse other questions tagged c++ opengl graphics or ask your own question. These work reasonably well, except they do not fade in intensity according to the attenuation of the light source. Not the answer you're looking for?Browse other questions tagged opengl matrix glsl shadow affinetransform or ask your own question.
I have inspected the data that is loaded into the VBO manually and the points used to represent the line are at the center of the middle ellipse and at the center of the bottom ellipse. You tell your m_mvp is the identity, so I guess the input in the vertex shader is the same to the output (at least the vertex positions).
Not the answer you're looking for?Browse other questions tagged opengl or ask your own question.
Was using quaternions to handle rotations but they were similarly distorted so went back to using rotation matrices and kept the rotation simple, in one axis. I believe that this is due to me viewing everything in projection mode, thus making everything appear to converge. It has been confirmed through math that it is indeed parallel to my camera to origin vector but obviously doesn't appear that way. The yellow line represents the line from my camera to the origin and the orange is the new line.


I would suggest double checking your projection matrix when filling the shadow map to make sure it is as "tight" as possible, that is its far plane as as close as possible.
We still have to give solutions for those problems until resources like NeHe and others upgrade.
When you call drawing functions, things are literally drawn to the framebuffer the very moment you issue the draw call -- well actually OpenGL batches up all the commands internally and processes them in order. It has simple planar shadows, using the stencil buffer and a projection matrix popularized in SGI's cookbook years ago.
As the projection matrix MATRIX does not produce an affine transformation, I needed to divide the distance calculation by point.w. So far I do not understand what is drawn from opengl, and what is the overlay from the widgets. What i had forgot to do is take the transform of the spline and multiply it by the (proj * view) matrix. It looks like I'm doing some multiplication step in the wrong order or not using the perspective matrix correctly or got a sign wrong. When I am restored to a "clean" slate again, how is it that my box moves across the screen? It just draws the vertices the moment you make the draw calls (glVertex in your case) and then forgets about them. But when OpenGL is about to process those drawing calls, it will draw to the framebuffer with the matrices set to the state at this specific position in the batch. I understand that this is not an affine transformation, but I'm unclear on the implications. What I'm confused on is how to get a meaningful comparison from light to point in the fragment shader -- or really, why what I'm trying there is wrong. You can either compute M2 - the matrix needed for the wheel to be displayed correctly - or, since the wheel is relative to the body of the car (thus, there is a matrix M3 such that M2 = M1 * M3) you modify M1. Once you understood this it becomes trivial to understand how the matrix stack can do its "magic".



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