48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
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#include "UserInteraction.h"
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#include <GL/glew.h>
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#include <iostream>
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#include <cmath>
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UserInteraction::UserInteraction(Renderer* renderer, CgPointFixNode* fixer, float* vbuff)
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: renderer(renderer), vbuff(vbuff), fixer(fixer), i(-1) {}
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void UserInteraction::setModelview(const glm::mat4& mv) { renderer->setModelview(mv); }
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void UserInteraction::setProjection(const glm::mat4& p) { renderer->setProjection(p); }
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void UserInteraction::grabPoint(int mouse_x, int mouse_y){
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// render scene
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glClearColor(0, 0, 0, 0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glDisable(GL_FRAMEBUFFER_SRGB);
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renderer->draw();
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glFlush();
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// read color
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color c(3);
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glReadPixels(mouse_x, mouse_y, 1, 1, GL_RGB, GL_UNSIGNED_BYTE, &c[0]);
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i = colorToIndex(c);
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if (i != -1) fixer->fixPoint(i);
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// return to normal state
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glClearColor(0.25f, 0.25f, 0.25f, 0);
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glEnable(GL_FRAMEBUFFER_SRGB);
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}
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void UserInteraction::releasePoint() { if (i == -1) return; fixer->releasePoint(i); i = -1; }
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void UserInteraction::movePoint(vec3 v) {
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if (i == -1) return;
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fixer->releasePoint(i);
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for(int j = 0; j < 3; j++)
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vbuff[3 * i + j] += v[j];
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fixer->fixPoint(i);
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}
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GridMeshUI::GridMeshUI(Renderer* renderer, CgPointFixNode* fixer, float* vbuff, unsigned int n)
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: UserInteraction(renderer, fixer, vbuff), n(n) {}
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int GridMeshUI::colorToIndex(color c) const {
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if (c[2] != 51) return -1;
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int vx = std::round((n - 1) * c[0] / 255.0);
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int vy = std::round((n - 1) * c[1] / 255.0);
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return n * vy + vx;
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}
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