50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
#include <cstddef>
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#include "VertexBuffer.h"
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#include "defines.h"
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VertexBuffer::VertexBuffer(void *vertexData, void *indexData, uint32_t numVertices, uint32_t numIndices) {
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glGenVertexArrays(1, &VAO);
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glBindVertexArray(VAO);
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glGenBuffers(1, &bufferId);
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glBindBuffer(GL_ARRAY_BUFFER, bufferId);
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glBufferData(GL_ARRAY_BUFFER, numVertices * sizeof(Vertex), vertexData, GL_STATIC_DRAW);
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glGenBuffers(1, &EBO);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, numIndices * sizeof(uint32_t), indexData, GL_STATIC_DRAW);
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// Position
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(struct Vertex, position));
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// UV Texture Mapping
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(struct Vertex, textureCoords));
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// Normal vectors
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glEnableVertexAttribArray(2);
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glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(struct Vertex, normalVec));
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// Color
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glEnableVertexAttribArray(3);
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glVertexAttribPointer(3, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) offsetof(struct Vertex, color));
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// This will also unbind the vertex buffer and index buffer
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glBindVertexArray(0);
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}
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VertexBuffer::~VertexBuffer() {
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glDeleteBuffers(1, &bufferId);
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}
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void VertexBuffer::bind() {
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glBindVertexArray(VAO);
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}
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void VertexBuffer::unbind() {
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glBindVertexArray(0);
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}
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