CODEWITHSUNDEEP
iphoneopengl-essmoothing
Oleg
Oleg

Reputation: 1097

smooth in opengl does not work

glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_SRC_COLOR);
glShadeModel(GL_SMOOTH);    // Разрешить плавное сглаживание
glClearColor(0.0f, 0.0f, 0.0f, 0.5f);   // Черный фон
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); // Сглаживание линий
glEnable(GL_BLEND);         // Разрешить смешивание
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);

//set the format and location for verticies
glVertexPointer(3, GL_FLOAT, 0, vertices);

glNormalPointer(GL_FLOAT, 0, normals);

glCullFace(GL_FRONT);
glDepthFunc(GL_LEQUAL);

//draw the triangles
glDrawArrays(GL_TRIANGLES, 0, numberOfVertices);

Here is my code, and now I have no idea why code doesn't work. I'll be very grateful for advice.

Upvotes: 2

Views: 1135

Answers (1)

Wroclai
Wroclai

Reputation: 26925

It seems like you don't have proper understanding of the term smooth in this context.

First, the GL_LINE_SMOOTH_HINT only affects lines. Furthermore, I refer to the documentation.

Second, glShadeModel() sets the type of shading your next primitive should have. GL_SMOOTH will make the vertices' colors interpolated in each resulting pixel fragment. GL_FLAT, however, only take one computed color of a vertex and automatically assign it to each pixel fragment that your primitive represents. Furthermore, I refer to the documentation.

Your understanding of smooth is not, like you think, applicable on triangles. If you really want a smooth model you should increase the number of polygons in the model.

Upvotes: 1

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