diff options
Diffstat (limited to 'Source/Graphics/Billboard.cpp')
| -rw-r--r-- | Source/Graphics/Billboard.cpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/Source/Graphics/Billboard.cpp b/Source/Graphics/Billboard.cpp new file mode 100644 index 00000000..2941254d --- /dev/null +++ b/Source/Graphics/Billboard.cpp @@ -0,0 +1,131 @@ +//----------------------------------------------------------------------------- +// Name: Billboard.cpp +// Developer: Wolfire Games LLC +// Author: Phillip Isola +// Description: Images that rotate to face the camera +// License: Read below +//----------------------------------------------------------------------------- +// +// +// Copyright 2022 Wolfire Games LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +//----------------------------------------------------------------------------- +#include "Billboard.h" + +#include <Graphics/vbocontainer.h> +#include <Graphics/camera.h> +#include <Graphics/graphics.h> +#include <Graphics/shaders.h> +#include <Graphics/textures.h> + +#include <Math/overgrowth_geometry.h> +#include <Math/vec3math.h> +#include <Math/vec4math.h> + +#include <Internal/profiler.h> + +#include <cmath> + +static RC_VBOContainer vbo; + +void DrawBillboard(const TextureRef& texture_ref, const vec3& pos, float scale, const vec4& color, AlphaMode alpha_mode){ + if (!texture_ref.valid()) return; + Camera* cam = ActiveCameras::Get(); + if(!cam->checkSphereInFrustum(pos, scale*0.25f)){ + return; + } + PROFILER_GPU_ZONE(g_profiler_ctx, "DrawBillboard()"); + if( !vbo->valid()) + { + const float origo[] = { + 0.0f,0.0f,0.0f, + }; + + vbo->Fill(kVBOFloat | kVBOStatic, sizeof(origo), (void*)&origo[0]); + } + + Shaders* shaders = Shaders::Instance(); + Graphics* graphics = Graphics::Instance(); + + GLState gl_state; + { + PROFILER_GPU_ZONE(g_profiler_ctx, "GLState"); + gl_state.blend = (alpha_mode == kStraightBlend); + gl_state.cull_face = false; + gl_state.depth_write = !gl_state.blend; + gl_state.depth_test = true; + if(alpha_mode == kPremultiplied){ + gl_state.blend_src = GL_ONE; + } + CHECK_GL_ERROR(); + graphics->setGLState(gl_state); + } + + int shader_id; + { + PROFILER_GPU_ZONE(g_profiler_ctx, "Shader"); + if(graphics->use_sample_alpha_to_coverage || gl_state.blend){ + shader_id = shaders->returnProgram("billboard #ALPHA_TO_COVERAGE #FLIP_Y", Shaders::kGeometry); + } else { + shader_id = shaders->returnProgram("billboard #FLIP_Y", Shaders::kGeometry); + } + + shaders->setProgram(shader_id); + + } + + Textures::Instance()->bindTexture(texture_ref); + + mat4 model; + model.SetTranslation(pos); + + { + PROFILER_GPU_ZONE(g_profiler_ctx, "Uniforms"); + shaders->SetUniformMat4("mv", cam->GetViewMatrix() * model); + shaders->SetUniformMat4("p", cam->GetProjMatrix() ); + shaders->SetUniformVec2("billboardDim", vec2(1,1)); + vec4 temp_color = color; + float mult = powf(Graphics::Instance()->hdr_white_point, 2.2f); + temp_color[0] *= mult; + temp_color[1] *= mult; + temp_color[2] *= mult; + shaders->SetUniformVec4("color", temp_color); + //shaders->SetUniformVec2("screenDim", vec2(graphics->config_.screen_width(), graphics->config_.screen_height())); + shaders->SetUniformFloat("scale", scale); + } + + { + PROFILER_GPU_ZONE(g_profiler_ctx, "Attrib"); + int vert_attrib_id = shaders->returnShaderAttrib("vert_attrib", shader_id); + graphics->EnableVertexAttribArray(vert_attrib_id); + vbo->Bind(); + glVertexAttribPointer(vert_attrib_id, 3, GL_FLOAT, false, sizeof(float) * 3, (const void*)0); + } + + if(graphics->use_sample_alpha_to_coverage){ + glEnable( GL_SAMPLE_ALPHA_TO_COVERAGE ); + } + + { + PROFILER_GPU_ZONE(g_profiler_ctx, "DrawArrays"); + graphics->DrawArrays( GL_POINTS, 0, vbo->size()/sizeof(float)/3 ); + } + + if(graphics->use_sample_alpha_to_coverage){ + glDisable( GL_SAMPLE_ALPHA_TO_COVERAGE ); + } + + graphics->ResetVertexAttribArrays(); +} |