Lucas de Vries
70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
#include "beam_node.h"
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#include "render/driver.h"
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#include "aabbox.h"
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#include "frustum.h"
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#include "render/vertexBuffer.h"
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extern double pixelSizeRatio;
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namespace scene {
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BeamNode::BeamNode(const render::RenderState* Material, float Width, const vec3d& startPoint, const vec3d& endPoint, bool StaticSize)
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: material(Material), width(Width), endPosition(endPoint), staticSize(StaticSize), uvLength(1.f)
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{
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position = abs_position = startPoint;
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setFlag(NF_NoMatrix, true);
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if(Material->baseMat != render::MAT_Solid)
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setFlag(NF_Transparent, true);
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}
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bool BeamNode::preRender(render::RenderDriver& driver) {
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auto& cam_pos = driver.cam_pos;
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if(!visible)
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return false;
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line3dd line(abs_position, endPosition);
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AABBoxd box(line);
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if(box.overlaps(driver.getViewFrustum().bound)) {
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sortDistance = line.getClosestPoint(cam_pos, false).distanceTo(cam_pos);
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return true;
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}
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else {
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return false;
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}
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}
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void BeamNode::render(render::RenderDriver& driver) {
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auto& cam_pos = driver.cam_pos;
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double size = width * abs_scale;
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if(staticSize)
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size *= sortDistance / pixelSizeRatio;
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vec3d offset = (endPosition - abs_position).cross(driver.cam_facing).normalized(size);
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auto* buffer = render::VertexBufferTCV::fetch(material);
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auto* verts = buffer->request(1, render::PT_Quads);
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Color col = color;
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verts[0].pos = vec3f(abs_position + offset - cam_pos);
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verts[0].uv = vec2f(0,0);
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verts[0].col = col;
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verts[1].pos = vec3f(endPosition + offset - cam_pos);
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verts[1].uv = vec2f(uvLength,0);
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verts[1].col = col;
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verts[2].pos = vec3f(endPosition - offset - cam_pos);
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verts[2].uv = vec2f(uvLength,1);
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verts[2].col = col;
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verts[3].pos = vec3f(abs_position - offset - cam_pos);
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verts[3].uv = vec2f(0,1);
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verts[3].col = col;
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}
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};
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