79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
#include "LineBatch.hpp"
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#include "Mesh.hpp"
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#include <GL/glew.h>
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inline constexpr uint LB_VERTEX_SIZE = (3+4);
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LineBatch::LineBatch(size_t capacity) : capacity(capacity) {
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const VertexAttribute attrs[] = { {3},{4}, {0} };
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buffer = std::make_unique<float[]>(capacity * LB_VERTEX_SIZE * 2);
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mesh = std::make_unique<Mesh>(buffer.get(), 0, attrs);
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index = 0;
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}
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LineBatch::~LineBatch(){
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}
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void LineBatch::line(
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float x1, float y1,
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float z1, float x2,
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float y2, float z2,
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float r, float g, float b, float a
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) {
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if (index + LB_VERTEX_SIZE * 2 >= capacity) {
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flush();
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}
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buffer[index] = x1;
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buffer[index+1] = y1;
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buffer[index+2] = z1;
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buffer[index+3] = r;
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buffer[index+4] = g;
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buffer[index+5] = b;
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buffer[index+6] = a;
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index += LB_VERTEX_SIZE;
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buffer[index] = x2;
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buffer[index+1] = y2;
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buffer[index+2] = z2;
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buffer[index+3] = r;
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buffer[index+4] = g;
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buffer[index+5] = b;
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buffer[index+6] = a;
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index += LB_VERTEX_SIZE;
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}
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void LineBatch::box(float x, float y, float z, float w, float h, float d,
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float r, float g, float b, float a) {
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w *= 0.5f;
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h *= 0.5f;
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d *= 0.5f;
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line(x-w, y-h, z-d, x+w, y-h, z-d, r,g,b,a);
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line(x-w, y+h, z-d, x+w, y+h, z-d, r,g,b,a);
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line(x-w, y-h, z+d, x+w, y-h, z+d, r,g,b,a);
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line(x-w, y+h, z+d, x+w, y+h, z+d, r,g,b,a);
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line(x-w, y-h, z-d, x-w, y+h, z-d, r,g,b,a);
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line(x+w, y-h, z-d, x+w, y+h, z-d, r,g,b,a);
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line(x-w, y-h, z+d, x-w, y+h, z+d, r,g,b,a);
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line(x+w, y-h, z+d, x+w, y+h, z+d, r,g,b,a);
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line(x-w, y-h, z-d, x-w, y-h, z+d, r,g,b,a);
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line(x+w, y-h, z-d, x+w, y-h, z+d, r,g,b,a);
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line(x-w, y+h, z-d, x-w, y+h, z+d, r,g,b,a);
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line(x+w, y+h, z-d, x+w, y+h, z+d, r,g,b,a);
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}
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void LineBatch::flush(){
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if (index == 0)
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return;
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mesh->reload(buffer.get(), index / LB_VERTEX_SIZE);
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mesh->draw(GL_LINES);
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index = 0;
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}
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void LineBatch::lineWidth(float width) {
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glLineWidth(width);
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}
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