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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "SmoothHeightMeshDrawer.h"
#include "Game/UnsyncedGameCommands.h"
#include "Sim/Misc/SmoothHeightMesh.h"
#include "Rendering/GL/VertexArray.h"
#include "System/float3.h"
namespace { // prevents linking problems in case of duplicate symbols
class AirMeshActionExecutor : public IUnsyncedActionExecutor {
public:
static const std::string COMMAND_NAME;
AirMeshActionExecutor() : IUnsyncedActionExecutor(COMMAND_NAME,
"Show/Hide the smooth air-mesh map overlay") {}
bool Execute(const UnsyncedAction& action) const {
SetBoolArg(smoothHeightMeshDrawer->DrawEnabled(), action.GetArgs());
LogSystemStatus("smooth air-mesh map overlay", smoothHeightMeshDrawer->DrawEnabled());
return true;
}
};
const std::string AirMeshActionExecutor::COMMAND_NAME = "AirMesh";
} // namespace (unnamed)
SmoothHeightMeshDrawer::SmoothHeightMeshDrawer()
: drawEnabled(false)
{
unsyncedGameCommands->AddActionExecutor(new AirMeshActionExecutor());
}
SmoothHeightMeshDrawer::~SmoothHeightMeshDrawer() {
if (unsyncedGameCommands != NULL) {
unsyncedGameCommands->RemoveActionExecutor(AirMeshActionExecutor::COMMAND_NAME);
}
}
SmoothHeightMeshDrawer* SmoothHeightMeshDrawer::GetInstance() {
static SmoothHeightMeshDrawer drawer;
return &drawer;
}
void SmoothHeightMeshDrawer::Draw(float yoffset) {
if (!drawEnabled)
return;
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glLineWidth(1.0f);
glDisable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
glDisable(GL_TEXTURE_1D);
glDisable(GL_CULL_FACE);
const unsigned char color[4] = {0, 255, 0, 255};
const float quadSize = 4.0f * smoothGround->GetResolution();
const unsigned int numQuadsX = smoothGround->GetFMaxX() / quadSize;
const unsigned int numQuadsZ = smoothGround->GetFMaxY() / quadSize;
CVertexArray* va = GetVertexArray();
va->Initialize();
va->EnlargeArrays((numQuadsX + 1) * (numQuadsZ + 1) * 4, 0, VA_SIZE_C);
for (unsigned int zq = 0; zq <= numQuadsZ; zq++) {
for (unsigned int xq = 0; xq <= numQuadsX; xq++) {
const float x = xq * quadSize;
const float z = zq * quadSize;
const float h1 = smoothGround->GetHeightAboveWater(x, z ) + yoffset;
const float h2 = smoothGround->GetHeightAboveWater(x + quadSize, z ) + yoffset;
const float h3 = smoothGround->GetHeightAboveWater(x + quadSize, z + quadSize) + yoffset;
const float h4 = smoothGround->GetHeightAboveWater(x, z + quadSize) + yoffset;
va->AddVertexQC(float3(x, h1, z ), color);
va->AddVertexQC(float3(x + quadSize, h2, z ), color);
va->AddVertexQC(float3(x + quadSize, h3, z + quadSize), color);
va->AddVertexQC(float3(x, h4, z + quadSize), color);
}
}
va->DrawArrayC(GL_QUADS);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
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