96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
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//
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// Created by lukas on 05.02.22.
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//
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#define GL_GLEXT_PROTOTYPES
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#include <valarray>
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#include <glm/vec3.hpp>
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#include <glm/ext/matrix_transform.hpp>
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#include <GL/gl.h>
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#include <glm/ext/matrix_clip_space.hpp>
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#include "Camera.h"
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#include "../blocks/BlockRenderer.h"
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void Camera::setPos(double x, double y, double z) {
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this->x = x;
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this->y = y;
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this->z = z;
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updateCameraPos();
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}
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void Camera::setRotation(double rotx, double roty) {
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rx = rotx;
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ry = roty;
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updateCameraPos();
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}
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void Camera::updateCameraPos() {
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// Projection matrix : 45° Field of View, 4:3 ratio, display range : 0.1 unit <-> 100 units
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glm::mat4 Projection = glm::perspective(glm::radians(45.0f), (float) width / (float) height, 0.1f, 100.0f);
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// Or, for an ortho camera :
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//glm::mat4 Projection = glm::ortho(-10.0f,10.0f,-10.0f,10.0f,0.0f,100.0f); // In world coordinates
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//
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// float rotation = M_PI;
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//
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// float x = cos(rotation);
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// float y = sin(rotation);
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const float radius = 5.0f;
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double camX = sin(rx) * radius;
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double camZ = cos(rx) * radius;
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double camY = sin(ry) * radius;
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glm::mat4 View = glm::lookAt(
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glm::vec3(2.0f, 2.0f, 3.0f), // and looks at the origin
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glm::vec3(camX, camZ, camY), // Camera is at (4,3,3), in World Space
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glm::vec3(0, 0, 1) // Head is up (set to 0,-1,0 to look upside-down)
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);
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auto View2 = glm::translate(View, glm::vec3(x, -y, -z));
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// Model matrix : an identity matrix (model will be at the origin)
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glm::mat4 Model = glm::mat4(1.0f);
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// Our ModelViewProjection : multiplication of our 3 matrices
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glm::mat4 mvp = Projection * View2 * Model; // Remember, matrix multiplication is the other way around
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// todo not really generic if we call blockrenderer here
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glUniformMatrix4fv((int) BlockRenderer::getInstance()->getMVPhandle(), 1, GL_FALSE, &mvp[0][0]);
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}
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Camera::Camera(double width, double height) : width(width), height(height) {}
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void Camera::setWindowSize(double width, double height) {
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this->width = width;
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this->height = height;
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}
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void Camera::addRotaion(double rotx, double roty) {
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rx -= rotx / 300;
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ry -= roty / 300;
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// limit to 2pi
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rx = std::fmod(rx, (2 * M_PI));
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ry = std::fmod(ry, (2 * M_PI));
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updateCameraPos();
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}
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void Camera::addPos(double x, double y, double z) {
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this->x += x;
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this->y += y;
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this->z += z;
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updateCameraPos();
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}
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double Camera::getxangle() const {
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return rx;
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}
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double Camera::getyangle() const {
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return ry;
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}
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