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POWhat's the correct way to draw a distorted plane in OpenGL?
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2013-06-07T16:47:51.090
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2018-06-20T13:35:35.050
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2018-06-20T13:35:00.260
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I've tryed to distort a plane using GL_QUADS, GL_TRIANGLES and GL_POLYGON: <pre><code>glBegin(GL_QUADS); for (int i = 0; i < squareIn.size(); i++) { glNormal3f(0,0,1); glTexCoord2f(squareIn[i]->v1->x,squareIn[i]->v1->y); glVertex2f(squareOut[i]->v1->x,squareOut[i]->v1->y); glTexCoord2f(squareIn[i]->v2->x,squareIn[i]->v2->y); glVertex2f(squareOut[i]->v2->x,squareOut[i]->v2->y); glTexCoord2f(squareIn[i]->v3->x,squareIn[i]->v3->y); glVertex2f(squareOut[i]->v3->x,squareOut[i]->v3->y); glTexCoord2f(squareIn[i]->v4->x,squareIn[i]->v4->y); glVertex2f(squareOut[i]->v4->x,squareOut[i]->v4->y); glTexCoord2f(squareIn[i]->v1->x,squareIn[i]->v1->y); glVertex2f(squareOut[i]->v1->x,squareOut[i]->v1->y); } glEnd(); </code></pre> But all of them gives this result when I do a extreme distortion: <img src="https://i.stack.imgur.com/TWF59.png" alt="Plane distorted"> Expected result: <img src="https://i.stack.imgur.com/SvSZw.png" alt="Expected result"> I saw two possible solutions right now, using glNormal or glMultMatrixf. glNormal apparently look a elegant solution, while glMultMatrixf look complex. But I can't find any code explaining how to calculate glNormals to texture a Plane. Here's <a href="http://www.gamedev.net/topic/419296-skewedsheared-texture-mapping-in-opengl/" rel="nofollow noreferrer">a good example</a> using glMultMatrif.
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<c++><opengl-es>
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What's the correct way to draw a distorted plane in OpenGL?
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1. USCarlos Oliveira
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