/*
* Handle dragging of mouse for transformations
*/
void
mouseMotion(int x, int y) {
GLint dx = (x - start_pos[0]);
GLint dy = (start_pos[1] - y);
vec4 world_vec = inverse(ss->mv) * vec4(dx, dy, 0.0, 0.0);
for (unsigned int i = 0; i < objects.size(); ++i) {
if (wireframe_vao == i && new_axis != -1) {
switch (mode) {
case Translate:
switch (axis) {
case X:
objects[i].translate *= Angel::Translate(
0.01f * world_vec * vec3(1.0, 0.0, 0.0) // X-mask
);
break;
case Y:
objects[i].translate *= Angel::Translate(
0.01f * world_vec * vec3(0.0, 1.0, 0.0) // Y-mask
);
break;
case Z:
objects[i].translate *= Angel::Translate(
0.01f * world_vec * vec3(0.0, 0.0, -1.0) // Z-mask
);
break;
}
for (unsigned int j = 0; j < manipulator.size(); ++j) {
manipulator[j].translate = objects[i].translate;
}
break;
case Rotate:
switch (axis) {
case X:
objects[i].rotate = Angel::RotateX(
world_vec[0]
) * objects[i].rotate;
break;
case Y:
objects[i].rotate = Angel::RotateY(
world_vec[1]
) * objects[i].rotate;
break;
case Z:
objects[i].rotate = Angel::RotateZ(
world_vec[2]
) * objects[i].rotate;
break;
}
break;
case Scale:
vec4 scale = world_vec * 0.005f;
vec3 scale_vec = vec3(scale.x, scale.y, scale.z);
switch (axis) {
case X: objects[i].scale[0][0] += scale_vec[0]; break;
case Y: objects[i].scale[1][1] += scale_vec[1]; break;
case Z: objects[i].scale[2][2] -= scale_vec[2]; break;
}
for (short j = 0; j < 3; ++j) {
if (objects[i].scale[j][j] < 1.0f) {
objects[i].scale[j][j] = 1.0f;
}
}
break;
}
}
}
if (mode != Scale) {
start_pos[0] = x;
start_pos[1] = y;
}
glutPostRedisplay();
}
