OpenGLでの様々な図形の描画 
基本的な三角形
void drawTriangle() {
glBegin(GL_TRIANGLES);
glVertex3f(-1, 0, 0);
glVertex3f(0, 1, 0);
glVertex3f(1, 0, 0);
glEnd();
}
正方形（平面）
void drawPlate()
{
glBegin(GL_POLYGON);
glVertex3f(-1,-1,0);
glVertex3f(-1,1,0);
glVertex3f(1,1,0);
glVertex3f(1,-1,0);
glEnd();
}
立方体
テクスチャー無し法線あり
void drawBox(float size) {
glBegin(GL_QUADS);
glNormal3f(0.0f, 0.0f, 1.0f);
glVertex3f(-size, -size, size);
glVertex3f(size, -size, size);
glVertex3f(size, size, size);
glVertex3f(-size, size, size);
glNormal3f(0.0f, 0.0f, -1.0f);
glVertex3f(-size, -size, -size);
glVertex3f(-size, size, -size);
glVertex3f(size, size, -size);
glVertex3f(size, -size, -size);
glNormal3f(0.0f, 1.0f, 0.0f);
glVertex3f(-size, size, -size);
glVertex3f(-size, size, size);
glVertex3f(size, size, size);
glVertex3f(size, size, -size);
glNormal3f(0.0f, -1.0f, 0.0f);
glVertex3f(-size, -size, -size);
glVertex3f(size, -size, -size);
glVertex3f(size, -size, size);
glVertex3f(-size, -size, size);
glNormal3f(1.0f, 0.0f, 0.0f);
glVertex3f(size, -size, -size);
glVertex3f(size, size, -size);
glVertex3f(size, size, size);
glVertex3f(size, -size, size);
glNormal3f(-1.0f, 0.0f, 0.0f);
glVertex3f(-size, -size, -size);
glVertex3f(-size, -size, size);
glVertex3f(-size, size, size);
glVertex3f(-size, size, -size);
glEnd();
}
テクスチャ有り法線有り
void drawBoxWithTexAndNormal(float size, int texID) {
const float sizeS = 0.0f;
const float sizeZ = 1.0f;
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texID);
glBegin(GL_QUADS);
glNormal3f(0.0f, 0.0f, 1.0f);
glTexCoord2f(sizeS, sizeS);
glVertex3f(-size, -size, size);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(size, -size, size);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(size, size, size);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(-size, size, size);
glNormal3f(0.0f, 0.0f, -1.0f);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(-size, -size, -size);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(-size, size, -size);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(size, size, -size);
glTexCoord2f(sizeS, sizeS);
glVertex3f(size, -size, -size);
glNormal3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(-size, size, -size);
glTexCoord2f(sizeS, sizeS);
glVertex3f(-size, size, size);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(size, size, size);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(size, size, -size);
glNormal3f(0.0f, -1.0f, 0.0f);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(-size, -size, -size);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(size, -size, -size);
glTexCoord2f(sizeS, sizeS);
glVertex3f(size, -size, size);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(-size, -size, size);
glNormal3f(1.0f, 0.0f, 0.0f);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(size, -size, -size);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(size, size, -size);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(size, size, size);
glTexCoord2f(sizeS, sizeS);
glVertex3f(size, -size, size);
glNormal3f(-1.0f, 0.0f, 0.0f);
glTexCoord2f(sizeS, sizeS);
glVertex3f(-size, -size, -size);
glTexCoord2f(sizeZ, sizeS);
glVertex3f(-size, -size, size);
glTexCoord2f(sizeZ, sizeZ);
glVertex3f(-size, size, size);
glTexCoord2f(sizeS, sizeZ);
glVertex3f(-size, size, -size);
glEnd();
}
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