Lucas de Vries
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#include "frame_line.h"
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#include "render/driver.h"
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#include "render/vertexBuffer.h"
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#include <algorithm>
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extern double frameLen_s;
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namespace scene {
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FrameLineNode::FrameLineNode(const render::RenderState& material, float duration) : mat(material), interpDuration(duration), age(0), life(1000.f), fadeAge(1000.f) {
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setFlag(NF_NoMatrix, true);
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}
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bool FrameLineNode::preRender(render::RenderDriver& driver) {
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if(frameLen_s > 0) {
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age += (float)frameLen_s;
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endPos = abs_position.interpolate(prevPos, interpDuration / frameLen_s);
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prevPos = abs_position;
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}
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vec3d off = abs_position - driver.cam_pos;
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sortDistance = off.getLength();
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return off.dot(driver.cam_facing) > 0;
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}
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void FrameLineNode::render(render::RenderDriver& driver) {
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auto& camPos = driver.cam_pos;
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auto* verts = render::VertexBufferTCV::fetch(&mat)->request(1, render::PT_Lines);
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float alpha = age > fadeAge ? 1.f - std::min((age-fadeAge)/(life-fadeAge), 1.f) : 1.f;
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verts[0].col = startCol;
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verts[0].col.a *= alpha;
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verts[0].pos = vec3f(abs_position - camPos);
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verts[0].uv = vec2f(0,0);
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verts[1].col = endCol;
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verts[1].col.a *= alpha;
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verts[1].pos = vec3f(endPos - camPos);
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verts[1].uv = vec2f(1,0);
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}
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}; |