96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
//
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// Created by Epagris on 2020. 03. 16..
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//
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#include "Cam.h"
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#include "utils.h"
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eg3d::Cam::Cam() {
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}
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void eg3d::Cam::loadDefaults() {
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mProjParams.loadDefaults();
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mViewParams.loadDefaults();
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}
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const XMFLOAT4X4 &eg3d::Cam::getViewMatrix() const {
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return mMView;
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}
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const XMFLOAT4X4 &eg3d::Cam::getProjMatrix() const {
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return mMProj;
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}
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void eg3d::Cam::constructViewMatrix() {
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XMMATRIX r = XMMatrixRotationX(mViewParams.pitch) * XMMatrixRotationY(mViewParams.yaw); // forgatások (yaw, pitch)
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XMMATRIX t = XMMatrixTranslation(mViewParams.position.x, mViewParams.position.y, mViewParams.position.z); // eltolás
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XMStoreFloat4x4(&mMView, MT(t*r)); // view mátrix letárolása
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XMVECTOR dir = XMVectorSet(0.0f, 0.0f, -1.0f, 0.0f); // (0,0,-1) irányba néz alapból a kamera
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XMStoreFloat3(&mVViewDirection, XMVector3Transform(dir, r)); // forgatott vektor kiszámítása és letárolása
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}
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void eg3d::Cam::constructProjMatrix() {
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XMMATRIX p = XMMatrixPerspectiveFovLH(mProjParams.FOV, mProjParams.AspectRatio, mProjParams.NearPlane, mProjParams.FarPlane);
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XMStoreFloat4x4(&mMProj, MT(p));
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}
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void eg3d::Cam::setProjParams(const eg3d::ProjParams &pp) {
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mProjParams = pp;
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constructProjMatrix(); // projekciós mátrix újragenerálása
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}
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eg3d::ProjParams eg3d::Cam::getProjParams() const {
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return mProjParams;
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}
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void eg3d::Cam::setViewParams(const eg3d::ViewParams &vp) {
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mViewParams = vp;
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constructViewMatrix();
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}
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eg3d::ViewParams eg3d::Cam::getViewParams() const {
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return mViewParams;
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}
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void eg3d::Cam::advance(float ds) {
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XMVECTOR s = XMLoadFloat3(&mViewParams.position);
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XMVECTOR dir = XMLoadFloat3(&mVViewDirection);
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s = XMVectorAdd(s, XMVectorScale(dir, ds));
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XMStoreFloat3(&mViewParams.position, s);
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constructViewMatrix();
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}
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void eg3d::Cam::yaw(float dphi) {
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mViewParams.yaw += dphi;
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constructViewMatrix();
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}
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void eg3d::Cam::pitch(float drho) {
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mViewParams.pitch += drho;
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constructViewMatrix();
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}
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// -----------------------------
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eg3d::ProjParams::ProjParams() {
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loadDefaults();
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}
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void eg3d::ProjParams::loadDefaults() {
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FOV = XM_PIDIV2; // 90 fokos látószög
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AspectRatio = 1.0f; // 1:1-es képarány
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NearPlane = 1.0f; // közeli sík
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FarPlane = 10.0f;
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}
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eg3d::ViewParams::ViewParams() {}
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void eg3d::ViewParams::loadDefaults() {
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position.x = position.y = position.z = 0.0f; // (0,0,0), origó
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yaw = 0.0f; // nincs forgatás
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pitch = 0.0f; // nincs billentés
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}
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