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Questions tagged [gouraud]

Gouraud shading, named after Henri Gouraud, is an interpolation method used in computer graphics to produce continuous shading of surfaces represented by polygon meshes.

Gouraud shading, named after Henri Gouraud, is an interpolation method used in computer graphics to produce continuous shading of surfaces represented by polygon meshes.

In practice, Gouraud shading is most often used to achieve continuous lighting on triangle surfaces by computing the lighting at the corners of each triangle and linearly interpolating the resulting colours for each pixel covered by the triangle.

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In gouraud shading, what is the T-junction issure and how to demonstrate it with OpenGL

I noticed here in the Gouraud Shading part, it said that "T-Junctions with adjoining polygons can sometimes result in visual anomalies. In general, T-Junctions should be avoided". It seems like the T-junction is about three surfaces in picture below…
TonyLic
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Most efficient algorithm to calculate vertex normals from set of triangles for Gouraud shading

We are given a set of triangles. Each triangle is a triplet of points. Each point is a triplet of real numbers. We can calculate surface normal for each triangle. For Gouraud shading however, we need vertex normals. Therefore we have to visit each…
Jayesh
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What is the difference between Phong Shading and Gouraud Shading?

As I understand it, Gouraud shading calculates light color for each vertex and does interpolation on that color, whereas Phong shading interpolates the normal for each pixel and calculates light color based on that interpolated value. However, when…
v4vendeta
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Gouraud Shading in JavaFX

Each face has 3 colors (one for each vertex). I want to use Gouraud shading to blend these colors. So far, I have taken some inspiration from the FXyz library. My current approach uses the setTextureModeVertices3D from the FXyz library. But this…
Stan van der Bend
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Processing output nothing using gouraud shading

sorry, I am a new on opengl es and processing below processing and shaders output only background PShader Gouraud,Phong; rocket = loadShape("rocket.obj"); rocket.setFill(color(800, 0, 0)); Gouraud=…
Ki ki Ki
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OpenGL: How do I render individual RGB values given a cross product that contains the total light?

I've been working on my own implementation of a Gouraud style shading model, and I've got the rest of it working pretty much how I want it, but the problem I've run into is it only shows white light. The calc_color function is where this operation…
Razmode
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Can't get Gouraud Shading in OpenGL to work

I'm trying to get a shape to have some shading due to a light source but I'd like the shape to all be one colour. My problem is that no matter how hard I try I cannot seem to get any shading on a singular colour model. I've simplified my model to a…
Sarah Tattersall
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Is Gouraud Shading with a Diffuse Map a "thing"?

As I understand it: When you want to use Gouraud shading, the color of a fragment is determined by interpolating the per-vertex colors. Thus all computation is contained within the vertex shader. However if we want to use a diffuse map to granularly…
arm.u
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Why is three.js inconsistent about gouraud interpolation?

I want to shade a THREE.BoxBufferGeometry using a simple THREE.MeshLambertMaterial. The material is supposed to use a Lambert illumination model to pick the colors for each vertex (and it does), and then use Gouraud shading to produce smooth…
MadEmperorYuri
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How to do gouraud shading?

Could someone explain Gouraud shading to me? I can go ahead and Google "gouraud shading", but it doesn't make much sense to me. I have 3 vertices with an (x, y) position and an int[r,g,b] color. I want to linearly interpolate (not sure what this…
atkayla
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Understanding small-scale Gouraud Shading with an example

I am in a computer graphics course and have just passed the lecture on Phong and Gouraud shading. I didn't really understand what was being said, so I turned to the textbook for clarification and found a workable example that might help me out. I'd…
PinkElephantsOnParade
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GLSL 1.5 can't get color input

I just want to do a simple Gouraud Shading with some different colors on my objects. Basically my problem is, that I can't get the color values into the shaders, it just renders black. If I define a vector in the shader as a color for the whole…
user2922706
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Composing the ADS (Phong/Gourang) components

I have the basic shader code below for the Phong lighting model. I've testing the diffuse, ambient and specular lighting and they're producing the correct results. When it comes to composing them on the final line I keep getting an effect that looks…
user2211776
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How are colour-values interpolated in a Gouraud-shaderscript?

The gouraud-shader computes lighting at the corners of each triangle and linearly interpolates the resulting colours for each pixel covered by the triangle. How would you program this certain interpolation (in GLSL-code) ? Do you even have to code…
user1511417
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