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AsuRaHanAsuRaHan
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добавил кубики и класс
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‎rendering/CubeRenderer.cpp

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#include "CubeRenderer.h"
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CubeRenderer::CubeRenderer(ShaderManager& shaderManager) : shaderManager(shaderManager), pCamera(nullptr) {
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SetupCubeData();
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shaderManager.loadVertexShader("cubeVertexShader", R"(
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#version 330 core
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layout(location = 0) in vec3 aPos;
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layout(location = 1) in vec3 aInstancePosition;
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layout(location = 2) in vec3 aInstanceColor;
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uniform mat4 projection;
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uniform mat4 view;
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uniform float scale;
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uniform vec3 cameraPosition;
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out vec3 vColor;
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out vec3 Normal;
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out vec3 FragPos;
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void main()
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{
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vec3 worldPosition = aInstancePosition + vec3(scale * 0.5, scale * 0.5, 0.0);
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vec3 scaledPosition = (aPos * scale * 0.8) + worldPosition;
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FragPos = scaledPosition;
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Normal = normalize(aPos);
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gl_Position = projection * view * vec4(scaledPosition, 1.0);
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vColor = aInstanceColor;
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}
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)");
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shaderManager.loadFragmentShader("cubeFragmentShader", R"(
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#version 330 core
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in vec3 vColor;
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in vec3 Normal;
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in vec3 FragPos;
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uniform vec3 cameraPosition;
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uniform vec3 lightColor;
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out vec4 FragColor;
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void main()
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{
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vec3 norm = normalize(Normal);
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vec3 lightDir = normalize(cameraPosition - FragPos); // íàïðàâëåíèå ñâåòà îò êàìåðû ê ôðàãìåíòó
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float diff = max(dot(norm, lightDir), 0.0);
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vec3 diffuse = diff * lightColor;
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vec3 result = (0.3 + diffuse) * vColor; // 0.3 - ýòî àìáèåíòíûé öâåò
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FragColor = vec4(result, 1.0);
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}
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)");
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shaderManager.linkProgram("cubeShaderProgram", "cubeVertexShader", "cubeFragmentShader");
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}
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void CubeRenderer::SetCamera(const Camera& camera) {
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this->pCamera = &camera;
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}
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void CubeRenderer::SetupCubeData() {
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// Âåðøèíû êóáà
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//float vertices[] = {
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// -0.5f, -0.5f, -0.5f,
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// 0.5f, -0.5f, -0.5f,
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// 0.5f, 0.5f, -0.5f,
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// -0.5f, 0.5f, -0.5f,
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// -0.5f, -0.5f, 0.5f,
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// 0.5f, -0.5f, 0.5f,
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// 0.5f, 0.5f, 0.5f,
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// -0.5f, 0.5f, 0.5f
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//};
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//// Èíäåêñû äëÿ ïîñòðîåíèÿ êóáà
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//unsigned int indices[] = {
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// 0, 1, 2, 2, 3, 0, // front
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// 1, 5, 6, 6, 2, 1, // right
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// 7, 6, 5, 5, 4, 7, // back
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// 4, 0, 3, 3, 7, 4, // left
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// 4, 5, 1, 1, 0, 4, // bottom
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// 3, 2, 6, 6, 7, 3 // top
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//};
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float vertices[] = {
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-0.5f, -0.5f, -0.55f, // 0 - èçìåíåíà Z-êîîðäèíàòà
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0.5f, -0.5f, -0.55f, // 1 - èçìåíåíà Z-êîîðäèíàòà
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0.5f, 0.5f, -0.55f, // 2 - èçìåíåíà Z-êîîðäèíàòà
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-0.5f, 0.5f, -0.55f, // 3 - èçìåíåíà Z-êîîðäèíàòà
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-0.5f, -0.5f, 0.5f,
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0.5f, -0.5f, 0.5f,
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0.5f, 0.5f, 0.5f,
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-0.5f, 0.5f, 0.5f
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};
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// Èíäåêñû îñòàþòñÿ òåìè æå, òàê êàê ïîðÿäîê âåðøèí íå èçìåíèëñÿ
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unsigned int indices[] = {
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0, 1, 2, 2, 3, 0, // front
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1, 5, 6, 6, 2, 1, // right
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7, 6, 5, 5, 4, 7, // back
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4, 0, 3, 3, 7, 4, // left
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4, 5, 1, 1, 0, 4, // bottom
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3, 2, 6, 6, 7, 3 // top
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};
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glGenVertexArrays(1, &VAO);
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glGenBuffers(1, &VBO);
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glGenBuffers(1, &EBO);
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glGenBuffers(1, &instanceVBO);
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glBindVertexArray(VAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
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// Âåðøèííûå àòðèáóòû äëÿ êóáà
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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// Óáåäèòåñü, ÷òî instanceVBO òàêæå ïðàâèëüíî íàñòðîåí
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glBindBuffer(GL_ARRAY_BUFFER, instanceVBO);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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void CubeRenderer::Render(const std::vector<Vector3d>& positions, const std::vector<Vector3d>& colors, float cellSize) {
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if (!pCamera) return;
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GLuint shaderProgram = shaderManager.getProgram("cubeShaderProgram");
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glUseProgram(shaderProgram);
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glBindVertexArray(VAO);
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// Íàñòðîéêà àòðèáóòîâ äëÿ èíñòàíñèíãà
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glBindBuffer(GL_ARRAY_BUFFER, instanceVBO);
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glBufferData(GL_ARRAY_BUFFER, positions.size() * sizeof(Vector3d) * 2, NULL, GL_STATIC_DRAW);
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for (size_t i = 0; i < positions.size(); ++i) {
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glBufferSubData(GL_ARRAY_BUFFER, i * sizeof(Vector3d) * 2, sizeof(Vector3d), &positions[i]);
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glBufferSubData(GL_ARRAY_BUFFER, (i * sizeof(Vector3d) * 2) + sizeof(Vector3d), sizeof(Vector3d), &colors[i]);
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}
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 2 * sizeof(Vector3d), (void*)0);
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glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 2 * sizeof(Vector3d), (void*)sizeof(Vector3d));
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glEnableVertexAttribArray(1);
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glEnableVertexAttribArray(2);
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glVertexAttribDivisor(1, 1); // Ýòî ãîâîðèò OpenGL èñïîëüçîâàòü ñëåäóþùèé àòðèáóò äëÿ êàæäîãî èíñòàíñà
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glVertexAttribDivisor(2, 1);
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GLint projectionLoc = glGetUniformLocation(shaderProgram, "projection");
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GLint viewLoc = glGetUniformLocation(shaderProgram, "view");
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GLint scaleLoc = glGetUniformLocation(shaderProgram, "scale");
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GLint cameraPositionLoc = glGetUniformLocation(shaderProgram, "cameraPosition");
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GLint lightColorLoc = glGetUniformLocation(shaderProgram, "lightColor");
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glUniformMatrix4fv(projectionLoc, 1, GL_FALSE, pCamera->GetProjectionMatrix());
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glUniformMatrix4fv(viewLoc, 1, GL_FALSE, pCamera->GetViewMatrix());
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glUniform1f(scaleLoc, cellSize);
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// Ïîëó÷àåì ïîçèöèþ êàìåðû
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float posX, posY, posZ;
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pCamera->GetPosition(posX, posY, posZ);
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glUniform3f(cameraPositionLoc, posX, posY, posZ);
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// Óñòàíîâêà öâåòà ñâåòà
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glUniform3f(lightColorLoc, 1.0f, 1.0f, 1.0f);
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//glDrawElementsInstanced(GL_TRIANGLES, 18, GL_UNSIGNED_INT, 0, positions.size());
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glDrawElementsInstanced(GL_TRIANGLES, 36, GL_UNSIGNED_INT, 0, positions.size());
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glBindVertexArray(0);
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}

‎rendering/CubeRenderer.h

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#pragma once
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#ifndef CUBERENDERER_H_
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#define CUBERENDERER_H_
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#include "../system/GLFunctions.h"
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#include "../system/ShaderManager.h"
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#include "../mathematics/Vector3d.h"
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#include "Camera.h"
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#include <vector>
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#include <array>
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#include <string>
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class CubeRenderer {
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public:
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CubeRenderer(ShaderManager& shaderManager);
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void Render(const std::vector<Vector3d>& positions, const std::vector<Vector3d>& colors, float cellSize);
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void SetCamera(const Camera& camera);
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private:
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void SetupCubeData();
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ShaderManager& shaderManager;
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GLuint VAO, VBO, EBO, instanceVBO;
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GLuint instanceCount;
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const Camera* pCamera; // Óêàçàòåëü íà êàìåðó
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};
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#endif // CUBERENDERER_H_

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