// Previous declarations player cam; // Create a camera const float PI = 3.14159265f; //---------------------------------------------------------------// Object Definitions //---------------------------------------------------------------// A 3D Point typedef struct // Define A Point { float x, y, z; // Coordinates Of A Point } point3f; //--------------------------------------------------------------- // A 3D Vector typedef struct // Define a vector { float x, y, z; // Lengths of vector components } vector3f; //--------------------------------------------------------------- typedef struct { // position, current view point, up vector point3f pos, cvp, upv; } player; //--------------------------------------------------------------- // This function converts degrees to radians and // then takes the cosine of the angle //---------------------------------------------------------------float cosd(float degrees) { float radians, angle; radians = degrees * PI / 180; angle = (float)cos(radians); return angle; } //--------------------------------------------------------------- // rotate function //--------------------------------------------------------------- // This Function Will Rotate The Camera View Left And Right //--------------------------------------------------------------- void RotateCam(float rotAngle) { float a, b, c; // variables for working out quadratics vector3f vectorA,// vector from cam.pos to cam.cvp vectorB1, vectorB2;// vector from cam.pos to cam.nvp // get the vector from pos to cvp vectorA.x = cam.cvp.x - cam.pos.x; vectorA.z = cam.cvp.z - cam.pos.x; // convert vectorA to a unit vector float mag = (float)sqrt(vectorA.x * vectorA.x + vectorA.z * vectorA.z); vectorA.x /= mag; vectorA.z /=mag; // calculate the coefficients of the quadratic equation a = (vectorA.x * vectorA.x) + (vectorA.z * vectorA.z); b = -2 * vectorA.x * cosd(rotAngle); c = (cosd(rotAngle) * cosd(rotAngle)) - (vectorA.z * vectorA.z); // calcualte the answers for x and z vectorB1.x = (-b + (float)sqrt((b*b) - 4 * a * c)) / (2 * a); vectorB1.z = (cosd(rotAngle) - vectorA.x * vectorB1.x) / vectorA.z; vectorB2.x = (-b - (float)sqrt((b*b) - 4 * a * c)) / (2 * a); vectorB2.z = (cosd(rotAngle) - vectorA.x * vectorB2.x) / vectorA.z; if (rotAngle > 0) { if (cam.cvp.z <= 0) { cam.cvp.x = vectorB2.x + cam.cvp.x; cam.cvp.z = vectorB2.z + cam.cvp.z; } else { cam.cvp.x = vectorB1.x + cam.cvp.x; cam.cvp.z = vectorB1.z + cam.cvp.z; } } else if (rotAngle < 0) { if (cam.cvp.z <= 0) { cam.cvp.x = vectorB1.x + cam.cvp.x; cam.cvp.z = vectorB1.z + cam.cvp.z; } else { cam.cvp.x = vectorB2.x + cam.cvp.x; cam.cvp.z = vectorB2.z + cam.cvp.z; } } } //--------------------------------------------------------------- // it rotates, kind of, but not the way i expected, can someone please help me or can you rotate the camera without using vectors