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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include <algorithm>
#include "SpherePartProjectile.h"
#include "Rendering/GlobalRendering.h"
#include "Rendering/ProjectileDrawer.h"
#include "Rendering/GL/VertexArray.h"
#include "Rendering/Textures/TextureAtlas.h"
using std::min;
CR_BIND_DERIVED(CSpherePartProjectile, CProjectile, (NULL, ZeroVector, 0, 0, 0.0f, 0.0f, 0, ZeroVector))
CR_REG_METADATA(CSpherePartProjectile, (
CR_MEMBER(centerPos),
CR_MEMBER(vectors),
CR_MEMBER(color),
CR_MEMBER(sphereSize),
CR_MEMBER(expansionSpeed),
CR_MEMBER(xbase),
CR_MEMBER(ybase),
CR_MEMBER(baseAlpha),
CR_MEMBER(age),
CR_MEMBER(ttl),
CR_MEMBER(texx),
CR_MEMBER(texy),
CR_RESERVED(16)
))
CSpherePartProjectile::CSpherePartProjectile(
const CUnit* owner,
const float3& centerPos,
int xpart,
int ypart,
float expansionSpeed,
float alpha,
int ttl,
const float3& color
):
CProjectile(centerPos, ZeroVector, owner, false, false, false),
centerPos(centerPos),
color(color),
sphereSize(expansionSpeed),
expansionSpeed(expansionSpeed),
xbase(xpart),
ybase(ypart),
baseAlpha(alpha),
age(0),
ttl(ttl)
{
deleteMe = false;
checkCol = false;
for(int y = 0; y < 5; ++y) {
const float yp = (y + ypart) / 16.0f*PI - PI/2;
for (int x = 0; x < 5; ++x) {
float xp = (x + xpart) / 32.0f*2*PI;
vectors[y*5 + x] = float3(math::sin(xp)*math::cos(yp), math::sin(yp), math::cos(xp)*math::cos(yp));
}
}
pos = centerPos+vectors[12] * sphereSize;
drawRadius = 60;
texx = projectileDrawer->sphereparttex->xstart + (projectileDrawer->sphereparttex->xend - projectileDrawer->sphereparttex->xstart) * 0.5f;
texy = projectileDrawer->sphereparttex->ystart + (projectileDrawer->sphereparttex->yend - projectileDrawer->sphereparttex->ystart) * 0.5f;
}
void CSpherePartProjectile::Update()
{
age++;
if (age >= ttl) {
deleteMe = true;
}
sphereSize += expansionSpeed;
pos = centerPos+vectors[12] * sphereSize;
}
void CSpherePartProjectile::Draw()
{
unsigned char col[4];
va->EnlargeArrays(4*4*4, 0, VA_SIZE_TC);
const float interSize = sphereSize + expansionSpeed * globalRendering->timeOffset;
for (int y = 0; y < 4; ++y) {
for (int x = 0; x < 4; ++x) {
float alpha =
baseAlpha *
(1.0f - min(1.0f, float(age + globalRendering->timeOffset) / (float) ttl)) *
(1.0f - math::fabs(y + ybase - 8.0f) / 8.0f * 1.0f);
col[0] = (unsigned char) (color.x * 255.0f * alpha);
col[1] = (unsigned char) (color.y * 255.0f * alpha);
col[2] = (unsigned char) (color.z * 255.0f * alpha);
col[3] = ((unsigned char) (40 * alpha)) + 1;
va->AddVertexQTC(centerPos + vectors[y*5 + x] * interSize, texx, texy, col);
va->AddVertexQTC(centerPos + vectors[y*5 + x + 1] * interSize, texx, texy, col);
alpha = baseAlpha * (1.0f - min(1.0f, (float)(age + globalRendering->timeOffset) / (float) ttl)) * (1 - math::fabs(y + 1 + ybase - 8.0f) / 8.0f*1.0f);
col[0] = (unsigned char) (color.x * 255.0f * alpha);
col[1] = (unsigned char) (color.y * 255.0f * alpha);
col[2] = (unsigned char) (color.z * 255.0f * alpha);
col[3] = ((unsigned char) (40 * alpha)) + 1;
va->AddVertexQTC(centerPos+vectors[(y + 1)*5 + x + 1] * interSize, texx, texy, col);
va->AddVertexQTC(centerPos+vectors[(y + 1)*5 + x] * interSize, texx, texy, col);
}
}
}
void CSpherePartProjectile::CreateSphere(const CUnit* owner, int ttl, float alpha, float expansionSpeed, float3 pos, float3 color)
{
for (int y = 0; y < 16; y += 4) {
for (int x = 0; x < 32; x += 4) {
new CSpherePartProjectile(owner, pos, x, y, expansionSpeed, alpha, ttl, color);
}
}
}
CSpherePartSpawner::CSpherePartSpawner()
: CProjectile()
, alpha(0.0f)
, ttl(0)
, expansionSpeed(0.0f)
, color(ZeroVector)
{
}
CR_BIND_DERIVED(CSpherePartSpawner, CProjectile, )
CR_REG_METADATA(CSpherePartSpawner,
(
CR_MEMBER_BEGINFLAG(CM_Config),
CR_MEMBER(alpha),
CR_MEMBER(ttl),
CR_MEMBER(expansionSpeed),
CR_MEMBER(color),
CR_MEMBER_ENDFLAG(CM_Config)
))
void CSpherePartSpawner::Init(const CUnit* owner, const float3& offset)
{
CProjectile::Init(owner, offset);
deleteMe = true;
CSpherePartProjectile::CreateSphere(owner, ttl, alpha, expansionSpeed, pos, color);
}
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