Open source Star Ruler 2 source code!
This commit is contained in:
Lucas de Vries
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#include "line_trail_node.h"
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#include "render/driver.h"
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#include "compat/gl.h"
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#include "main/references.h"
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#include "render/vertexBuffer.h"
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extern double frameLen_s;
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extern double pixelSizeRatio;
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namespace render {
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extern const RenderMesh* lastRenderedMesh;
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};
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namespace scene {
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LineTrailNode::LineTrailNode(const render::RenderState& material) :
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storedPositions(0), firstIndex(1), stored_s(0), lineLen_s(1), qualitySteps(1), mat(material)
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{
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setFlag(NF_NoMatrix, true);
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setFlag(NF_Independent, false);
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}
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bool LineTrailNode::preRender(render::RenderDriver& driver) {
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rebuildTransformation();
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stored_s += frameLen_s;
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double step = lineLen_s / double(LINE_POS_COUNT-1);
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if(stored_s >= step) {
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stored_s -= step;
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--firstIndex;
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if(firstIndex >= LINE_POS_COUNT)
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firstIndex = LINE_POS_COUNT - 1;
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if(storedPositions < LINE_POS_COUNT)
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++storedPositions;
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prevPositions[firstIndex] = abs_position;
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}
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sortDistance = abs_position.distanceTo(driver.cam_pos);
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return sortDistance < (3500.0 * pixelSizeRatio);
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}
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void LineTrailNode::render(render::RenderDriver& driver) {
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auto* vertBuffer = render::VertexBufferTCV::fetch(&mat);
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auto* v = vertBuffer->request(storedPositions + 1, render::PT_LineStrip);
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float startPct = (float)(stored_s / lineLen_s);
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auto& camPos = driver.cam_pos;
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v[0].pos = vec3f(abs_position - camPos);
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v[0].col = startCol;
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v[0].uv = vec2f(0, 0);
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for(unsigned i = 0; i < storedPositions; ++i) {
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auto& vert = v[i+1];
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unsigned index = (firstIndex + i) % LINE_POS_COUNT;
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vert.pos = vec3f(prevPositions[index] - camPos);
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float pct = startPct + (float(i) / float(LINE_POS_COUNT-1));
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vert.col = startCol.getInterpolated(endCol, pct);
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vert.uv = vec2f(pct, float(index) / float(LINE_POS_COUNT));
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}
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}
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ProjectileBatch::ProjectileBatch() {
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setFlag(NF_Transparent, true);
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sortDistance = 0.0;
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}
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ProjectileBatch::~ProjectileBatch() {
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for(auto i = projectiles.begin(), end = projectiles.end(); i != end; ++i) {
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auto* projs = i->second;
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if(!projs)
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continue;
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for(unsigned ind = 0, cnt = projs->size(); ind != cnt; ++ind) {
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auto& proj = projs->at(ind);
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proj.kill->drop();
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}
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delete projs;
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}
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}
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void ProjectileBatch::registerProj(const render::RenderState& mat, ProjEffect& eff) {
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auto*& projs = projectiles[&mat];
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if(!projs)
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projs = new std::vector<ProjEffect>;
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projs->push_back(eff);
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}
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bool ProjectileBatch::preRender(render::RenderDriver& driver) {
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if(projectiles.empty())
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return false;
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float time = (float)frameLen_s;
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for(auto i = projectiles.begin(), end = projectiles.end(); i != end; ++i) {
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auto* projs = i->second;
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if(!projs || projs->empty())
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continue;
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auto* pProj = &(*projs)[0];
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unsigned copyOff = 0;
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for(unsigned ind = 0, cnt = projs->size(); ind != cnt; ++ind) {
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auto& proj = pProj[ind];
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proj.life -= time;
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if(proj.life < 0 || **proj.kill) {
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copyOff += 1;
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proj.kill->drop();
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}
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else {
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proj.pos += vec3d(proj.dir * (proj.speed * time));
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if(copyOff)
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(*projs)[ind - copyOff] = proj;
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}
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}
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if(copyOff)
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projs->resize(projs->size() - copyOff);
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}
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return true;
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}
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void ProjectileBatch::render(render::RenderDriver& driver) {
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auto& camPos = driver.cam_pos;
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for(auto i = projectiles.begin(), end = projectiles.end(); i != end; ++i) {
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auto* projs = i->second;
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if(!projs)
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continue;
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unsigned count = projs->size();
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if(count == 0)
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continue;
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if(projs->begin()->line) {
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//Draw out projectiles in batches of 128
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unsigned start = 0;
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while(start < count) {
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unsigned drawCount;
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if(start + 128 <= count)
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drawCount = 128;
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else
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drawCount = count - start;
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auto* buffer = render::VertexBufferTCV::fetch(i->first);
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auto* verts = buffer->request(drawCount, render::PT_Lines);
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for(unsigned p = start; p < start + drawCount; ++p, verts += 2) {
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auto& proj = (*projs)[p];
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float alpha = std::min(1.f, proj.life / proj.fadeStart);
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verts[0].pos = vec3f(proj.pos - camPos);
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verts[0].uv = vec2f(0,0);
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verts[0].col = proj.start;
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verts[0].col.a *= alpha;
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verts[1].pos = vec3f(proj.pos - vec3d(proj.dir * proj.length) - camPos);
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verts[1].uv = vec2f(1,0);
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verts[1].col = proj.end;
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verts[1].col.a *= alpha;
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}
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start += drawCount;
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}
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}
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else {
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auto& cam_pos = driver.cam_pos;
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double aspect = 1.0;
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if(i->first->textures[0]) {
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auto size = i->first->textures[0]->size;
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if(size.x > 0 && size.y > 0)
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aspect = (float)size.y / (float)size.x;
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}
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//Draw out projectiles in batches of 64
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unsigned start = 0;
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while(start < count) {
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unsigned drawCount;
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if(start + 64 <= count)
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drawCount = 64;
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else
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drawCount = count - start;
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auto* buffer = render::VertexBufferTCV::fetch(i->first);
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auto* verts = buffer->request(drawCount, render::PT_Quads);
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for(unsigned p = start; p < start + drawCount; ++p, verts += 4) {
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auto& proj = (*projs)[p];
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float alpha = std::min(1.f, proj.life / proj.fadeStart);
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double size = aspect * proj.length * 0.5;
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vec3d end = proj.pos - vec3d(proj.dir * proj.length);
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vec3d offset = vec3d(proj.pos - end).cross(driver.cam_facing).normalized(size);
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Color col = color;
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verts[0].pos = vec3f(end + offset - cam_pos);
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verts[0].uv = vec2f(0,0);
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verts[0].col = proj.end;
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verts[0].col.a *= alpha;
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verts[1].pos = vec3f(proj.pos + offset - cam_pos);
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verts[1].uv = vec2f(1.f,0);
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verts[1].col = proj.start;
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verts[1].col.a *= alpha;
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verts[2].pos = vec3f(proj.pos - offset - cam_pos);
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verts[2].uv = vec2f(1.f,1.f);
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verts[2].col = proj.start;
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verts[2].col.a *= alpha;
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verts[3].pos = vec3f(end - offset - cam_pos);
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verts[3].uv = vec2f(0,1.f);
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verts[3].col = proj.end;
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verts[3].col.a *= alpha;
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}
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start += drawCount;
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}
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}
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}
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}
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MissileBatch::MissileBatch() {
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setFlag(NF_Transparent, true);
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sortDistance = 0.0;
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}
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MissileBatch::~MissileBatch() {
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for(auto i = missiles.begin(), end = missiles.end(); i != end; ++i) {
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auto* msls = i->second;
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if(!msls)
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continue;
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for(unsigned ind = 0, cnt = msls->size(); ind != cnt; ++ind) {
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auto& missile = msls->at(ind);
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missile.track->drop();
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}
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delete msls;
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}
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}
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void MissileBatch::registerProj(const render::RenderState& mat, const render::RenderState& trail, MissileTrail& eff) {
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eff.lineStart = eff.lineCount = 0;
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eff.lineProgress = eff.startProgress = 0;
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MissileTrailMats mats = {&mat, &trail};
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auto*& msls = missiles[mats];
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if(!msls)
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msls = new std::vector<MissileTrail>;
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msls->push_back(eff);
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}
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bool MissileBatch::preRender(render::RenderDriver& driver) {
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if(missiles.empty())
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return false;
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if(frameLen_s == 0)
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return true;
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double gameTime = devices.driver->getGameTime();
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for(auto i = missiles.begin(), end = missiles.end(); i != end; ++i) {
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auto* msls = i->second;
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if(!msls)
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continue;
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unsigned copyOff = 0;
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for(unsigned ind = 0, cnt = msls->size(); ind != cnt; ++ind) {
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auto& missile = (*msls)[ind];
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auto& track = **missile.track;
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if(track.aliveUntil >= 0 && gameTime > track.aliveUntil) {
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if((int)missile.lineCount <= (int)missile.startProgress) {
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copyOff += 1;
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missile.track->drop();
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}
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else {
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missile.startProgress += frameLen_s * float(LINE_POS_COUNT) / missile.length;
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if(copyOff)
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(*msls)[ind - copyOff] = missile;
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}
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}
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else {
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missile.pos = (missile.pos).interpolate(track.pos + vec3d(track.vel) * (gameTime - track.lastUpdate), std::min(frameLen_s / 0.25, 1.0));
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missile.lastUpdate = gameTime;
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missile.lineProgress += frameLen_s * float(LINE_POS_COUNT) / missile.length;
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while(missile.lineProgress >= 1.f) {
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missile.lineProgress -= 1.f;
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missile.lineCount += 1;
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missile.lineStart = (missile.lineStart + LINE_POS_COUNT - 1) % LINE_POS_COUNT;
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if(missile.lineCount > LINE_POS_COUNT)
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missile.lineCount = LINE_POS_COUNT;
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missile.trail[missile.lineStart] = missile.pos;
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}
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if(copyOff)
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(*msls)[ind - copyOff] = missile;
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}
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}
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if(copyOff)
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msls->resize(msls->size() - copyOff);
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}
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return true;
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}
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void MissileBatch::render(render::RenderDriver& driver) {
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double gameTime = devices.driver->getGameTime();
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for(auto i = missiles.begin(), end = missiles.end(); i != end; ++i) {
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auto* msls = i->second;
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if(!msls)
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continue;
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//Render all sprites
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for(unsigned ind = 0, cnt = msls->size(); ind != cnt; ++ind) {
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auto& missile = (*msls)[ind];
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double until = missile.track->data.aliveUntil;
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if(until < 0 || until > gameTime)
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devices.render->drawBillboard(missile.pos, missile.size, *i->first.sprite, 0.0, &missile.color);
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}
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auto& cam_pos = driver.cam_pos;
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//Then render all trails
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for(unsigned ind = 0, cnt = msls->size(); ind != cnt; ++ind) {
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auto& missile = (*msls)[ind];
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if(missile.lineCount == 0)
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continue;
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auto* vertBuffer = render::VertexBufferTCV::fetch(i->first.trail);
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auto* v = vertBuffer->request(missile.lineCount + 1, render::PT_LineStrip);
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float startPct = (missile.startProgress + missile.lineProgress) * missile.length / float(LINE_POS_COUNT);
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v[0].pos = vec3f(missile.pos - cam_pos);
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v[0].col = missile.start;
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v[0].uv = vec2f(missile.startProgress * missile.length / float(LINE_POS_COUNT), 0);
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for(unsigned i = 0; i < missile.lineCount; ++i) {
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auto& vert = v[i+1];
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unsigned index = (missile.lineStart + i) % LINE_POS_COUNT;
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vert.pos = vec3f(missile.trail[index] - cam_pos);
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float pct = startPct + (float(i) / float(LINE_POS_COUNT-1));
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if(pct > 1.f)
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pct = 1.f;
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vert.col = missile.start.getInterpolated(missile.end, pct);
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vert.uv = vec2f(pct, float(index) / float(LINE_POS_COUNT));
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}
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}
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}
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}
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};
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