bool Player::RayCastApprox(spades::Vector3 start, spades::Vector3 dir){
Vector3 diff = position - start;
// |P-A| * cos(theta)
float c = Vector3::Dot(diff, dir);
// |P-A|^2
float sq = diff.GetPoweredLength();
// |P-A| * sin(theta)
float dist = sqrtf(sq - c * c);
return dist < 8.f;
}
void GLSoftLitSpriteRenderer::Render() {
SPADES_MARK_FUNCTION();
if(sprites.empty())
return;
// light every sprite
const std::vector<GLDynamicLight>& lights = renderer->lights;
for(size_t i = 0; i < sprites.size(); i++){
Sprite& spr = sprites[i];
if(spr.color.w < .0001f) {
// maybe emissive sprite...
spr.emission = spr.color.GetXYZ();
spr.color = MakeVector4(0.f, 0.f, 0.f, 0.f);
}else{
spr.emission = MakeVector3(0.f, 0.f, 0.f);
}
spr.dlR = MakeVector4(0, 0, 0, 0);
spr.dlG = MakeVector4(0, 0, 0, 0);
spr.dlB = MakeVector4(0, 0, 0, 0);
}
for(size_t j = 0; j < lights.size(); j++) {
const GLDynamicLight& l = lights[j];
const client::DynamicLightParam& dl = l.GetParam();
float spotTan = dl.type == client::DynamicLightTypeSpotlight ? tanf(dl.spotAngle * .5f) : 0.;
for(size_t i = 0; i < sprites.size(); i++){
Sprite& spr = sprites[i];
Vector3 v = dl.origin - spr.center;
float effectiveRadius = spr.radius + dl.radius;
if(v.GetChebyshevLength() > effectiveRadius)
continue;
float powdist = v.GetPoweredLength();
if(powdist > effectiveRadius * effectiveRadius)
continue;
float att = 1.f - powdist / (effectiveRadius * effectiveRadius);
float unif;
float directionalFactor = 1.f;
unif = 1.f - powdist / (spr.radius * spr.radius);
unif = std::max(.2f, unif);
if(dl.type == client::DynamicLightTypeSpotlight) {
float forward = Vector3::Dot(v, dl.spotAxis[2]);
if(forward > spr.radius) {
continue;
}else if(forward >= -spr.radius){
att *= .5f - (forward / spr.radius) * .5f;
directionalFactor = 1.f;
}else{
float cx = Vector3::Dot(spr.center - dl.origin, dl.spotAxis[0]);
float cy = Vector3::Dot(spr.center - dl.origin, dl.spotAxis[1]);
float sq = sqrtf(cx * cx + cy * cy);
float sprTan = spr.radius / (-spr.radius - forward);
float eff = sprTan + spotTan;
sq /= -forward;
if(sq > eff){
continue;
}
if(sq > eff - spotTan){
att *= (eff - sq) / spotTan;
}
}
}
Vector4 final;
if(unif < .9999f) {
Vector3 directional = v;
directional *= att * directionalFactor * (1.f - unif) / sqrtf(powdist);
final.x = directional.x;
final.y = directional.y;
final.z = directional.z;
bool OBB3::RayCast(spades::Vector3 start,
spades::Vector3 dir,
spades::Vector3 *hitPos) {
Vector3 normX = {m.m[0], m.m[1], m.m[2]};
Vector3 normY = {m.m[4], m.m[5], m.m[6]};
Vector3 normZ = {m.m[8], m.m[9], m.m[10]};
// subtract offset
Vector3 origin = {m.m[12], m.m[13], m.m[14]};
start -= origin;
Vector3 end = start + dir;
float dotX = Vector3::Dot(dir, normX);
float dotY = Vector3::Dot(dir, normY);
float dotZ = Vector3::Dot(dir, normZ);
// inside?
if(*this && start){
*hitPos = start;
return true;
}
// x-plane hit test
if(dotX != 0.f){
float startp = Vector3::Dot(start, normX);
float endp = Vector3::Dot(end, normX);
float boxp = Vector3::Dot(normX, normX);
float hit; // 0=start, 1=end
if(startp < endp){
hit = startp / (startp - endp);
}else{
hit = (boxp - startp) / (endp - startp);
}
if(hit >= 0.f){
*hitPos = start + dir * hit;
float yd = Vector3::Dot(*hitPos, normY);
float zd = Vector3::Dot(*hitPos, normZ);
if(yd >= 0 && zd >= 0 &&
yd <= normY.GetPoweredLength() &&
zd <= normZ.GetPoweredLength()) {
// hit x-plane
*hitPos += origin;
return true;
}
}
}
// y-plane hit test
if(dotY != 0.f){
float startp = Vector3::Dot(start, normY);
float endp = Vector3::Dot(end, normY);
float boxp = Vector3::Dot(normY, normY);
float hit; // 0=start, 1=end
if(startp < endp){
hit = startp / (startp - endp);
}else{
hit = (boxp - startp) / (endp - startp);
}
if(hit >= 0.f){
*hitPos = start + dir * hit;
float xd = Vector3::Dot(*hitPos, normX);
float zd = Vector3::Dot(*hitPos, normZ);
if(xd >= 0 && zd >= 0 &&
xd <= normX.GetPoweredLength() &&
zd <= normZ.GetPoweredLength()) {
// hit y-plane
*hitPos += origin;
return true;
}
}
}
// z-plane hit test
if(dotZ != 0.f){
float startp = Vector3::Dot(start, normZ);
float endp = Vector3::Dot(end, normZ);
float boxp = Vector3::Dot(normZ, normZ);
float hit; // 0=start, 1=end
if(startp < endp){
hit = startp / (startp - endp);
}else{
hit = (boxp - startp) / (endp - startp);
}
if(hit >= 0.f){
*hitPos = start + dir * hit;
float xd = Vector3::Dot(*hitPos, normX);
float yd = Vector3::Dot(*hitPos, normY);
if(xd >= 0 && yd >= 0 &&
xd <= normX.GetPoweredLength() &&
yd <= normY.GetPoweredLength()) {
// hit z-plane
*hitPos += origin;
return true;
}
}
}
return false;
}
void SWRenderer::ApplyDynamicLight(const DynamicLight &light) {
int fw = this->fb->GetWidth();
int fh = this->fb->GetHeight();
float fovX = tanf(sceneDef.fovX * 0.5f);
float fovY = tanf(sceneDef.fovY * 0.5f);
float dvx = -fovX * 2.f / static_cast<float>(fw);
float dvy = -fovY * 2.f / static_cast<float>(fh);
int minX = light.minX;
int minY = light.minY;
int maxX = light.maxX;
int maxY = light.maxY;
int lightHeight = maxY - minY;
SPAssert(minX >= 0);
SPAssert(minY >= 0);
SPAssert(maxX <= fw);
SPAssert(maxY <= fh);
Vector3 lightCenter;
Vector3 diff = light.param.origin - sceneDef.viewOrigin;
lightCenter.x = Vector3::Dot(diff, sceneDef.viewAxis[0]);
lightCenter.y = Vector3::Dot(diff, sceneDef.viewAxis[1]);
lightCenter.z = Vector3::Dot(diff, sceneDef.viewAxis[2]);
int lightR = ToFixedFactor8(light.param.color.x);
int lightG = ToFixedFactor8(light.param.color.y);
int lightB = ToFixedFactor8(light.param.color.z);
float invRadius2 = 1.f / (light.param.radius * light.param.radius);
InvokeParallel2([=](unsigned int threadId, unsigned int numThreads) {
int startY = lightHeight * threadId / numThreads;
int endY = lightHeight * (threadId + 1) / numThreads;
startY += minY;
endY += minY;
auto *fb = this->fb->GetPixels();
float *db = depthBuffer.data();
fb += startY * fw + minX;
db += startY * fw + minX;
float vy = fovY + dvy * startY;
float vx = fovX + dvx * minX;
int lightWidth = maxX - minX;
for(int y = startY; y < endY; y++) {
float vx2 = vx;
auto *fb2 = fb;
auto *db2 = db;
for(int x = lightWidth; x > 0; x--) {
Vector3 pos;
pos.z = *db2;
pos.x = vx2 * pos.z;
pos.y = vy * pos.z;
pos -= lightCenter;
float dist = pos.GetPoweredLength();
dist *= invRadius2;
if(dist < 1.f) {
float strength = 1.f - dist;
strength *= strength;
strength *= 256.f;
int factor = static_cast<int>(strength);
int actualLightR = lightR * factor;
int actualLightG = lightG * factor;
int actualLightB = lightB * factor;
auto srcColor = *fb2;
auto srcColorR = (srcColor >> 16) & 0xff;
auto srcColorG = (srcColor >> 8) & 0xff;
auto srcColorB = srcColor & 0xff;
actualLightR *= srcColorR;
actualLightG *= srcColorG;
actualLightB *= srcColorB;
auto destColorR = actualLightR >> 16;
auto destColorG = actualLightG >> 16;
auto destColorB = actualLightB >> 16;
destColorR = std::min<uint32_t>(destColorR+srcColorR, 255);
destColorG = std::min<uint32_t>(destColorG+srcColorG, 255);
destColorB = std::min<uint32_t>(destColorB+srcColorB, 255);
uint32_t destColor = destColorB |
(destColorG<<8) | (destColorR<<16);
*fb2 = destColor;
}
vx2 += dvx;
fb2++; db2++;
}
vy += dvy;
fb += fw;
db += fw;
}
});
