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#include "Cameraman.h"
#include <algorithm>
#include <cmath>
#include <raylib.h>
#include <raymath.h>
#include "VectorMath.h"
Cameraman::Cameraman()
{
camera.position = Vector3{10.0f, 10.0f, 10.0f};
camera.target = Vector3{0.0f, 0.0f, 0.0f};
camera.up = Vector3{0.0f, 1.0f, 0.0f};
camera.fovy = 45;
camera.projection = CAMERA_PERSPECTIVE;
SetCameraMode(camera, CAMERA_CUSTOM);
m_angle.x = std::atan2(10.0f, 10.0f);
m_angle.y = std::atan2(10.0f, std::sqrt(std::pow(10.0f, 2) + std::pow(10.0f, 2)));
}
void
Cameraman::update(const float)
{
const auto drag = GetMouseDelta();
if (IsMouseButtonDown(0)) {
m_angle.x += drag.x * -0.01f;
m_angle.y = std::clamp(m_angle.y + drag.y * 0.01f, -1.483f, 1.483f);
}
const float zoom = GetMouseWheelMove();
if (zoom != 0.0f) {
const auto offset = Vector3Subtract(camera.target, camera.position);
const float current = Vector3Length(offset);
const float expected = std::clamp(current + zoom * 0.5f, 1.0f, 30.0f);
camera.position = Vector3Add(camera.target, Vector3Scale(offset, expected / current));
}
const float distance = dist(camera.position, camera.target);
camera.position.x = camera.target.x + distance * -std::sin(m_angle.x) * std::cos(m_angle.y);
camera.position.y = camera.target.y + distance * std::sin(m_angle.y);
camera.position.z = camera.target.z + distance * -std::cos(m_angle.x) * std::cos(m_angle.y);
}
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