forked from organicmaps/organicmaps-tmp
[drape] texture coord generation for stipple lines
This commit is contained in:
ExMix
Alex Zolotarev
parent
5f09ba278b
commit
d81394156a
1 changed files with 147 additions and 30 deletions
|
|
@ -18,6 +18,70 @@ namespace
|
|||
float const CAP = 1.0f;
|
||||
float const LEFT_WIDTH = 1.0f;
|
||||
float const RIGHT_WIDTH = -1.0f;
|
||||
size_t const TEX_BEG_IDX = 0;
|
||||
size_t const TEX_END_IDX = 1;
|
||||
|
||||
struct TexDescription
|
||||
{
|
||||
float m_globalLength;
|
||||
glsl::vec2 m_texCoord;
|
||||
};
|
||||
|
||||
class TextureCoordGenerator
|
||||
{
|
||||
public:
|
||||
TextureCoordGenerator(float const baseGtoPScale)
|
||||
: m_baseGtoPScale(baseGtoPScale)
|
||||
, m_basePtoGScale(1.0f / baseGtoPScale)
|
||||
{
|
||||
}
|
||||
|
||||
void SetRegion(dp::TextureManager::StippleRegion const & region, bool isSolid)
|
||||
{
|
||||
m_isSolid = isSolid;
|
||||
m_region = region;
|
||||
if (!m_isSolid)
|
||||
{
|
||||
m_maskLength = static_cast<float>(m_region.GetMaskPixelLength());
|
||||
m_patternLength = static_cast<float>(m_region.GetPatternPixelLength());
|
||||
}
|
||||
}
|
||||
|
||||
bool GetTexCoords(TexDescription & desc)
|
||||
{
|
||||
if (m_isSolid)
|
||||
{
|
||||
desc.m_texCoord = glsl::ToVec2(m_region.GetTexRect().Center());
|
||||
return true;
|
||||
}
|
||||
|
||||
float const pxLength = desc.m_globalLength * m_baseGtoPScale;
|
||||
float const maskRest = m_maskLength - m_pxCursor;
|
||||
|
||||
m2::RectF const & texRect = m_region.GetTexRect();
|
||||
if (maskRest < pxLength)
|
||||
{
|
||||
desc.m_globalLength = maskRest * m_basePtoGScale;
|
||||
desc.m_texCoord = glsl::vec2(texRect.maxX(), texRect.Center().y);
|
||||
return false;
|
||||
}
|
||||
|
||||
float texX = texRect.minX() + ((m_pxCursor + pxLength) / m_maskLength) * texRect.SizeX();
|
||||
m_pxCursor = fmodf(m_pxCursor + pxLength, m_patternLength);
|
||||
|
||||
desc.m_texCoord = glsl::vec2(texX, texRect.Center().y);
|
||||
return true;
|
||||
}
|
||||
|
||||
private:
|
||||
float const m_baseGtoPScale;
|
||||
float const m_basePtoGScale;
|
||||
dp::TextureManager::StippleRegion m_region;
|
||||
float m_maskLength = 0.0f;
|
||||
float m_patternLength = 0.0f;
|
||||
bool m_isSolid = true;
|
||||
float m_pxCursor = 0.0f;
|
||||
};
|
||||
}
|
||||
|
||||
LineShape::LineShape(m2::SharedSpline const & spline,
|
||||
|
|
@ -30,6 +94,7 @@ LineShape::LineShape(m2::SharedSpline const & spline,
|
|||
|
||||
void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::TextureManager> textures) const
|
||||
{
|
||||
typedef gpu::LineVertex LV;
|
||||
buffer_vector<gpu::LineVertex, 128> geometry;
|
||||
vector<m2::PointD> const & path = m_spline->GetPath();
|
||||
|
||||
|
|
@ -37,19 +102,24 @@ void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::Tex
|
|||
textures->GetColorRegion(m_params.m_color, colorRegion);
|
||||
glsl::vec2 colorCoord(glsl::ToVec2(colorRegion.GetTexRect().Center()));
|
||||
|
||||
TextureCoordGenerator texCoordGen(m_params.m_baseGtoPScale);
|
||||
dp::TextureManager::StippleRegion maskRegion;
|
||||
textures->GetStippleRegion(dp::TextureManager::TStipplePattern{1}, maskRegion);
|
||||
glsl::vec2 maskCoord(glsl::ToVec2(maskRegion.GetTexRect().Center()));
|
||||
if (m_params.m_pattern.empty())
|
||||
textures->GetStippleRegion(dp::TextureManager::TStipplePattern{1}, maskRegion);
|
||||
else
|
||||
textures->GetStippleRegion(m_params.m_pattern, maskRegion);
|
||||
|
||||
texCoordGen.SetRegion(maskRegion, m_params.m_pattern.empty());
|
||||
float const halfWidth = m_params.m_width / 2.0f;
|
||||
float const glbHalfWidth = halfWidth / m_params.m_baseGtoPScale;
|
||||
bool generateCap = m_params.m_cap != dp::ButtCap;
|
||||
|
||||
auto const calcTangentAndNormals = [&halfWidth](glsl::vec2 const & pt0, glsl::vec2 const & pt1,
|
||||
glsl::vec2 & tangent, glsl::vec2 & leftNormal,
|
||||
glsl::vec2 & rightNormal)
|
||||
{
|
||||
tangent = pt1 - pt0;
|
||||
leftNormal = halfWidth * glsl::normalize(glsl::vec2(tangent.y, -tangent.x));
|
||||
tangent = glsl::normalize(pt1 - pt0);
|
||||
leftNormal = halfWidth * glsl::vec2(tangent.y, -tangent.x);
|
||||
rightNormal = -leftNormal;
|
||||
};
|
||||
|
||||
|
|
@ -58,22 +128,30 @@ void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::Tex
|
|||
glsl::vec2 leftSegment(SEGMENT, LEFT_WIDTH);
|
||||
glsl::vec2 rightSegment(SEGMENT, RIGHT_WIDTH);
|
||||
|
||||
TexDescription texCoords[2];
|
||||
|
||||
if (generateCap)
|
||||
{
|
||||
glsl::vec2 startPoint = glsl::ToVec2(path[0]);
|
||||
glsl::vec2 endPoint = glsl::ToVec2(path[1]);
|
||||
glsl::vec2 tangent, leftNormal, rightNormal;
|
||||
calcTangentAndNormals(startPoint, endPoint, tangent, leftNormal, rightNormal);
|
||||
tangent = -halfWidth * glsl::normalize(tangent);
|
||||
tangent = -halfWidth * tangent;
|
||||
|
||||
glsl::vec3 pivot = glsl::vec3(startPoint, m_params.m_depth);
|
||||
glsl::vec2 leftCap(capType, LEFT_WIDTH);
|
||||
glsl::vec2 rightCap(capType, RIGHT_WIDTH);
|
||||
|
||||
geometry.push_back(gpu::LineVertex(pivot, leftNormal + tangent, colorCoord, maskCoord, leftCap));
|
||||
geometry.push_back(gpu::LineVertex(pivot, rightNormal + tangent, colorCoord, maskCoord, rightCap));
|
||||
geometry.push_back(gpu::LineVertex(pivot, leftNormal, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(pivot, rightNormal, colorCoord, maskCoord, rightSegment));
|
||||
texCoords[TEX_BEG_IDX].m_globalLength = 0.0;
|
||||
texCoords[TEX_END_IDX].m_globalLength = glbHalfWidth;
|
||||
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_END_IDX]), ());
|
||||
|
||||
geometry.push_back(LV(pivot, leftNormal + tangent, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftCap));
|
||||
geometry.push_back(LV(pivot, rightNormal + tangent, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, rightCap));
|
||||
geometry.push_back(LV(pivot, leftNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(pivot, rightNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, rightSegment));
|
||||
}
|
||||
|
||||
glsl::vec2 prevPoint;
|
||||
|
|
@ -108,26 +186,39 @@ void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::Tex
|
|||
|
||||
if (m_params.m_join == dp::BevelJoin)
|
||||
{
|
||||
geometry.push_back(gpu::LineVertex(startPivot, prevForming, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, zeroNormal, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, nextForming, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, nextForming, colorCoord, maskCoord, leftSegment));
|
||||
texCoords[TEX_BEG_IDX].m_globalLength = 0.0f;
|
||||
texCoords[TEX_END_IDX].m_globalLength = glsl::length(nextForming - prevForming) / m_params.m_baseGtoPScale;
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_END_IDX]), ());
|
||||
|
||||
geometry.push_back(LV(startPivot, prevForming, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(startPivot, zeroNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(startPivot, nextForming, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(startPivot, nextForming, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftSegment));
|
||||
}
|
||||
else
|
||||
{
|
||||
glsl::vec2 middleForming = glsl::normalize(prevForming + nextForming);
|
||||
glsl::vec2 zeroDxDy(0.0, 0.0);
|
||||
|
||||
texCoords[TEX_BEG_IDX].m_globalLength = 0.0f;
|
||||
texCoords[TEX_END_IDX].m_globalLength = glsl::length(nextForming - prevForming) / m_params.m_baseGtoPScale;
|
||||
TexDescription middle;
|
||||
middle.m_globalLength = texCoords[TEX_END_IDX].m_globalLength / 2.0f;
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
VERIFY(texCoordGen.GetTexCoords(middle), ());
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_END_IDX]), ());
|
||||
|
||||
if (m_params.m_join == dp::MiterJoin)
|
||||
{
|
||||
float const b = glsl::length(prevForming - nextForming) / 2.0;
|
||||
float const a = glsl::length(prevForming);
|
||||
middleForming *= static_cast<float>(sqrt(a * a + b * b));
|
||||
|
||||
geometry.push_back(gpu::LineVertex(startPivot, prevForming, colorCoord, maskCoord, zeroDxDy));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, zeroNormal, colorCoord, maskCoord, zeroDxDy));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, middleForming, colorCoord, maskCoord, zeroDxDy));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, nextForming, colorCoord, maskCoord, zeroDxDy));
|
||||
geometry.push_back(LV(startPivot, prevForming, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, zeroDxDy));
|
||||
geometry.push_back(LV(startPivot, zeroNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, zeroDxDy));
|
||||
geometry.push_back(LV(startPivot, middleForming, colorCoord, middle.m_texCoord, zeroDxDy));
|
||||
geometry.push_back(LV(startPivot, nextForming, colorCoord, texCoords[TEX_END_IDX].m_texCoord, zeroDxDy));
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -136,18 +227,38 @@ void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::Tex
|
|||
glsl::vec2 dxdyLeft(0.0, -1.0);
|
||||
glsl::vec2 dxdyRight(0.0, -1.0);
|
||||
glsl::vec2 dxdyMiddle(1.0, 1.0);
|
||||
geometry.push_back(gpu::LineVertex(startPivot, zeroNormal, colorCoord, maskCoord, zeroDxDy));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, prevForming, colorCoord, maskCoord, dxdyLeft));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, nextForming, colorCoord, maskCoord, dxdyRight));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, middleForming, colorCoord, maskCoord, dxdyMiddle));
|
||||
geometry.push_back(LV(startPivot, zeroNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, zeroDxDy));
|
||||
geometry.push_back(LV(startPivot, prevForming, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, dxdyLeft));
|
||||
geometry.push_back(LV(startPivot, nextForming, colorCoord, texCoords[TEX_END_IDX].m_texCoord, dxdyRight));
|
||||
geometry.push_back(LV(startPivot, middleForming, colorCoord, middle.m_texCoord, dxdyMiddle));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
geometry.push_back(gpu::LineVertex(startPivot, leftNormal, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(startPivot, rightNormal, colorCoord, maskCoord, rightSegment));
|
||||
geometry.push_back(gpu::LineVertex(endPivot, leftNormal, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(endPivot, rightNormal, colorCoord, maskCoord, rightSegment));
|
||||
texCoords[TEX_BEG_IDX].m_globalLength = 0.0;
|
||||
texCoords[TEX_END_IDX].m_globalLength = glsl::length(endPoint - startPoint);
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
while (!texCoordGen.GetTexCoords(texCoords[TEX_END_IDX]))
|
||||
{
|
||||
glsl::vec2 newEndPoint = startPoint + tangent * texCoords[TEX_END_IDX].m_globalLength;
|
||||
glsl::vec3 newEndPivot = glsl::vec3(newEndPoint, m_params.m_depth);
|
||||
|
||||
geometry.push_back(LV(startPivot, leftNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(startPivot, rightNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, rightSegment));
|
||||
geometry.push_back(LV(newEndPivot, leftNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(newEndPivot, rightNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, rightSegment));
|
||||
|
||||
startPoint = newEndPoint;
|
||||
startPivot = newEndPivot;
|
||||
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
texCoords[TEX_END_IDX].m_globalLength = glsl::length(endPoint - startPoint);
|
||||
}
|
||||
|
||||
geometry.push_back(LV(startPivot, leftNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(startPivot, rightNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, rightSegment));
|
||||
geometry.push_back(LV(endPivot, leftNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(endPivot, rightNormal, colorCoord, texCoords[TEX_END_IDX].m_texCoord, rightSegment));
|
||||
|
||||
prevPoint = startPoint;
|
||||
prevLeftNormal = leftNormal;
|
||||
|
|
@ -161,16 +272,22 @@ void LineShape::Draw(dp::RefPointer<dp::Batcher> batcher, dp::RefPointer<dp::Tex
|
|||
glsl::vec2 endPoint = glsl::ToVec2(path[lastPointIndex]);
|
||||
glsl::vec2 tangent, leftNormal, rightNormal;
|
||||
calcTangentAndNormals(startPoint, endPoint, tangent, leftNormal, rightNormal);
|
||||
tangent = halfWidth * glsl::normalize(tangent);
|
||||
tangent = halfWidth * tangent;
|
||||
|
||||
glsl::vec3 pivot = glsl::vec3(endPoint, m_params.m_depth);
|
||||
glsl::vec2 leftCap(capType, LEFT_WIDTH);
|
||||
glsl::vec2 rightCap(capType, RIGHT_WIDTH);
|
||||
|
||||
geometry.push_back(gpu::LineVertex(pivot, leftNormal, colorCoord, maskCoord, leftSegment));
|
||||
geometry.push_back(gpu::LineVertex(pivot, rightNormal, colorCoord, maskCoord, rightSegment));
|
||||
geometry.push_back(gpu::LineVertex(pivot, leftNormal + tangent, colorCoord, maskCoord, leftCap));
|
||||
geometry.push_back(gpu::LineVertex(pivot, rightNormal + tangent, colorCoord, maskCoord, rightCap));
|
||||
texCoords[TEX_BEG_IDX].m_globalLength = 0.0;
|
||||
texCoords[TEX_END_IDX].m_globalLength = glbHalfWidth;
|
||||
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_BEG_IDX]), ());
|
||||
VERIFY(texCoordGen.GetTexCoords(texCoords[TEX_END_IDX]), ());
|
||||
|
||||
geometry.push_back(LV(pivot, leftNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, leftSegment));
|
||||
geometry.push_back(LV(pivot, rightNormal, colorCoord, texCoords[TEX_BEG_IDX].m_texCoord, rightSegment));
|
||||
geometry.push_back(LV(pivot, leftNormal + tangent, colorCoord, texCoords[TEX_END_IDX].m_texCoord, leftCap));
|
||||
geometry.push_back(LV(pivot, rightNormal + tangent, colorCoord, texCoords[TEX_END_IDX].m_texCoord, rightCap));
|
||||
}
|
||||
|
||||
dp::GLState state(gpu::LINE_PROGRAM, dp::GLState::GeometryLayer);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue