1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* Copyright (C) 2022 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "ParticleRenderer.h"
#include "graphics/ParticleEmitter.h"
#include "graphics/ShaderDefines.h"
#include "graphics/ShaderManager.h"
#include "graphics/TextureManager.h"
#include "ps/CStrInternStatic.h"
#include "ps/Profile.h"
#include "renderer/DebugRenderer.h"
#include "renderer/Renderer.h"
#include "renderer/SceneRenderer.h"
struct ParticleRendererInternals
{
int frameNumber;
CShaderTechniquePtr techAdd;
CShaderTechniquePtr techSubtract;
CShaderTechniquePtr techOverlay;
CShaderTechniquePtr techMultiply;
CShaderTechniquePtr techWireframe;
std::vector<CParticleEmitter*> emitters[CSceneRenderer::CULL_MAX];
};
ParticleRenderer::ParticleRenderer()
{
m = new ParticleRendererInternals();
m->frameNumber = 0;
}
ParticleRenderer::~ParticleRenderer()
{
delete m;
}
void ParticleRenderer::Submit(int cullGroup, CParticleEmitter* emitter)
{
m->emitters[cullGroup].push_back(emitter);
}
void ParticleRenderer::EndFrame()
{
for (std::vector<CParticleEmitter*>& cullGroupEmitters : m->emitters)
cullGroupEmitters.clear();
// this should leave the capacity unchanged, which is okay since it
// won't be very large or very variable
}
struct SortEmitterDistance
{
SortEmitterDistance(const CMatrix3D& m) : worldToCam(m) { }
// TODO: if this is slow, we should pre-compute the distance for each emitter
bool operator()(CParticleEmitter* const& a, CParticleEmitter* const& b)
{
CVector3D posa = a->GetPosition();
CVector3D posb = b->GetPosition();
if (posa == posb)
return false;
float dista = worldToCam.Transform(posa).LengthSquared();
float distb = worldToCam.Transform(posb).LengthSquared();
return distb < dista;
}
CMatrix3D worldToCam;
};
void ParticleRenderer::PrepareForRendering(const CShaderDefines& context)
{
PROFILE3("prepare particles");
// Can't load the shader in the constructor because it's called before the
// renderer initialisation is complete, so load it the first time through here
if (!m->techWireframe)
{
m->techAdd = g_Renderer.GetShaderManager().LoadEffect(str_particle_add, context);
m->techSubtract = g_Renderer.GetShaderManager().LoadEffect(str_particle_subtract, context);
m->techOverlay = g_Renderer.GetShaderManager().LoadEffect(str_particle_overlay, context);
m->techMultiply = g_Renderer.GetShaderManager().LoadEffect(str_particle_multiply, context);
CShaderDefines contextWithWireframe = context;
contextWithWireframe.Add(str_MODE_WIREFRAME, str_1);
m->techWireframe = g_Renderer.GetShaderManager().LoadEffect(str_particle_solid, contextWithWireframe);
}
++m->frameNumber;
for (std::vector<CParticleEmitter*>& cullGroupEmitters : m->emitters)
{
PROFILE("update emitters");
for (CParticleEmitter* emitter : cullGroupEmitters)
{
emitter->UpdateArrayData(m->frameNumber);
emitter->PrepareForRendering();
}
}
CMatrix3D worldToCamera;
g_Renderer.GetSceneRenderer().GetViewCamera().GetOrientation().GetInverse(worldToCamera);
for (std::vector<CParticleEmitter*>& cullGroupEmitters : m->emitters)
{
// Sort back-to-front by distance from camera
PROFILE("sort emitters");
std::stable_sort(cullGroupEmitters.begin(), cullGroupEmitters.end(), SortEmitterDistance(worldToCamera));
}
// TODO: should batch by texture here when possible, maybe
}
void ParticleRenderer::Upload(
Renderer::Backend::IDeviceCommandContext* deviceCommandContext)
{
for (std::vector<CParticleEmitter*>& cullGroupEmitters : m->emitters)
for (CParticleEmitter* emitter : cullGroupEmitters)
emitter->UploadData(deviceCommandContext);
}
void ParticleRenderer::RenderParticles(
Renderer::Backend::IDeviceCommandContext* deviceCommandContext,
int cullGroup, bool wireframe)
{
CShaderTechnique* lastTech = nullptr;
for (CParticleEmitter* emitter : m->emitters[cullGroup])
{
CShaderTechnique* currentTech = nullptr;
if (wireframe)
{
currentTech = m->techWireframe.get();
}
else
{
switch (emitter->m_Type->m_BlendMode)
{
case CParticleEmitterType::BlendMode::ADD: currentTech = m->techAdd.get(); break;
case CParticleEmitterType::BlendMode::SUBTRACT: currentTech = m->techSubtract.get(); break;
case CParticleEmitterType::BlendMode::OVERLAY: currentTech = m->techOverlay.get(); break;
case CParticleEmitterType::BlendMode::MULTIPLY: currentTech = m->techMultiply.get(); break;
}
}
ENSURE(currentTech);
if (lastTech != currentTech)
{
if (lastTech)
deviceCommandContext->EndPass();
lastTech = currentTech;
deviceCommandContext->SetGraphicsPipelineState(lastTech->GetGraphicsPipelineState());
deviceCommandContext->BeginPass();
Renderer::Backend::IShaderProgram* shader = lastTech->GetShader();
const CMatrix3D transform =
g_Renderer.GetSceneRenderer().GetViewCamera().GetViewProjection();
const CMatrix3D modelViewMatrix =
g_Renderer.GetSceneRenderer().GetViewCamera().GetOrientation().GetInverse();
deviceCommandContext->SetUniform(
shader->GetBindingSlot(str_transform), transform.AsFloatArray());
deviceCommandContext->SetUniform(
shader->GetBindingSlot(str_modelViewMatrix), modelViewMatrix.AsFloatArray());
}
emitter->Bind(deviceCommandContext, lastTech->GetShader());
emitter->RenderArray(deviceCommandContext);
}
if (lastTech)
deviceCommandContext->EndPass();
}
void ParticleRenderer::RenderBounds(int cullGroup)
{
for (const CParticleEmitter* emitter : m->emitters[cullGroup])
{
const CBoundingBoxAligned bounds =
emitter->m_Type->CalculateBounds(emitter->GetPosition(), emitter->GetParticleBounds());
g_Renderer.GetDebugRenderer().DrawBoundingBox(bounds, CColor(0.0f, 1.0f, 0.0f, 1.0f), true);
}
}
|
