void Tank::draw()
{
node()->clear();
node()->drawSegment(
_gunBegin,
_gunBegin + _gunLength * Vec2::forAngle(CC_DEGREES_TO_RADIANS(_angle)),
1, uniformColor()
);
node()->drawSolidPoly(_base, sizeof(_base)/sizeof(*_base), colorFilter(Color4F::WHITE));
node()->drawSolidPoly(_head, sizeof(_head)/sizeof(*_head), uniformColor());
}
void DropCapsid::draw()
{
node()->clear();
float r = _size / 2;
node()->drawSolidCircle(Vec2::ZERO, r, 0, 12, colorFilter(Color4F::WHITE));
node()->drawSolidRect(
Vec2(-r/10, -9*r/10),
Vec2( r/10, 9*r/10),
uniformColor()
);
node()->drawSolidRect(
Vec2(-9*r/10, -r/10),
Vec2( 9*r/10, r/10),
uniformColor()
);
}
void SpaceStation::draw()
{
node()->clear();
float r = _size / 2;
Color4F darkGray = colorFilter(Color4F(0.3f, 0.3f, 0.3f, 1.0f));
node()->drawSolidCircle(Vec2::ZERO, r*1.05, 0, 12, darkGray);
node()->drawSolidCircle(Vec2::ZERO, r, 0, 12, colorFilter(Color4F::GRAY));
node()->drawSolidRect(
Vec2(-7*r/10, 4*r/10),
Vec2( 7*r/10, 6*r/10),
darkGray
);
node()->drawTriangleGradient(
Vec2(-7*r/10, -6*r/10),
Vec2( 7*r/10, -6*r/10),
Vec2( 0, r),
colorFilter(Color4F::GRAY), colorFilter(Color4F::GRAY), uniformColor()
);
}
//--------------------------------------------------------------------------------------------------
/// Draw the legend using shader programs
//--------------------------------------------------------------------------------------------------
void OverlayColorLegend::renderLegend(OpenGLContext* oglContext, OverlayColorLegendLayoutInfo* layout, const MatrixState& matrixState)
{
CVF_CALLSITE_OPENGL(oglContext);
CVF_TIGHT_ASSERT(layout);
CVF_TIGHT_ASSERT(layout->size.x() > 0);
CVF_TIGHT_ASSERT(layout->size.y() > 0);
Depth depth(false);
depth.applyOpenGL(oglContext);
// All vertices. Initialized here to set Z to zero once and for all.
static float vertexArray[] =
{
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 0.0f
};
// Per vector convenience pointers
float* v0 = &vertexArray[0];
float* v1 = &vertexArray[3];
float* v2 = &vertexArray[6];
float* v3 = &vertexArray[9];
float* v4 = &vertexArray[12];
// Constant coordinates
v0[0] = v3[0] = layout->x0;
v1[0] = v4[0] = layout->x1;
// Connects
static const ushort trianglesConnects[] = { 0, 1, 4, 0, 4, 3 };
ref<ShaderProgram> shaderProgram = oglContext->resourceManager()->getLinkedUnlitColorShaderProgram(oglContext);
CVF_TIGHT_ASSERT(shaderProgram.notNull());
if (shaderProgram->useProgram(oglContext))
{
shaderProgram->clearUniformApplyTracking();
shaderProgram->applyFixedUniforms(oglContext, matrixState);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glEnableVertexAttribArray(ShaderProgram::VERTEX);
glVertexAttribPointer(ShaderProgram::VERTEX, 3, GL_FLOAT, GL_FALSE, 0, vertexArray);
// Render color bar as one colored quad per pixel
int legendHeightPixelCount = static_cast<int>(layout->tickPixelPos->get(m_tickValues.size()-1) - layout->tickPixelPos->get(0) + 0.01);
if (m_scalarMapper.notNull())
{
int iPx;
for (iPx = 0; iPx < legendHeightPixelCount; iPx++)
{
const Color3ub& clr = m_scalarMapper->mapToColor(m_scalarMapper->domainValue((iPx+0.5)/legendHeightPixelCount));
float y0 = static_cast<float>(layout->legendRect.min().y() + iPx);
float y1 = static_cast<float>(layout->legendRect.min().y() + iPx + 1);
// Dynamic coordinates for rectangle
v0[1] = v1[1] = y0;
v3[1] = v4[1] = y1;
// Draw filled rectangle elements
{
UniformFloat uniformColor("u_color", Color4f(Color3f(clr)));
shaderProgram->applyUniform(oglContext, uniformColor);
#ifdef CVF_OPENGL_ES
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, trianglesConnects);
#else
glDrawRangeElements(GL_TRIANGLES, 0, 4, 6, GL_UNSIGNED_SHORT, trianglesConnects);
#endif
}
}
}
// Render frame
// Dynamic coordinates for tickmarks-lines
bool isRenderingFrame = true;
if (isRenderingFrame)
{
v0[0] = v2[0] = layout->legendRect.min().x()-0.5f;
v1[0] = v3[0] = layout->legendRect.max().x()-0.5f;
v0[1] = v1[1] = layout->legendRect.min().y()-0.5f;
v2[1] = v3[1] = layout->legendRect.max().y()-0.5f;
static const ushort frameConnects[] = { 0, 1, 1, 3, 3, 2, 2, 0};
UniformFloat uniformColor("u_color", Color4f(m_color));
shaderProgram->applyUniform(oglContext, uniformColor);
#ifdef CVF_OPENGL_ES
glDrawElements(GL_LINES, 8, GL_UNSIGNED_SHORT, frameConnects);
#else
glDrawRangeElements(GL_LINES, 0, 3, 8, GL_UNSIGNED_SHORT, frameConnects);
#endif
}
// Render tickmarks
bool isRenderingTicks = true;
if (isRenderingTicks)
{
// Constant coordinates
v0[0] = layout->x0;
v1[0] = layout->x1 - 0.5f*(layout->tickX - layout->x1) - 0.5f;
v2[0] = layout->x1;
v3[0] = layout->tickX - 0.5f*(layout->tickX - layout->x1) - 0.5f;
v4[0] = layout->tickX;
static const ushort tickLinesWithLabel[] = { 0, 4 };
static const ushort tickLinesWoLabel[] = { 2, 3 };
size_t ic;
for (ic = 0; ic < m_tickValues.size(); ic++)
{
float y0 = static_cast<float>(layout->legendRect.min().y() + layout->tickPixelPos->get(ic) - 0.5f);
// Dynamic coordinates for tickmarks-lines
v0[1] = v1[1] = v2[1] = v3[1] = v4[1] = y0;
UniformFloat uniformColor("u_color", Color4f(m_color));
shaderProgram->applyUniform(oglContext, uniformColor);
const ushort * linesConnects;
if ( m_visibleTickLabels[ic])
{
linesConnects = tickLinesWithLabel;
}
else
{
linesConnects = tickLinesWoLabel;
}
#ifdef CVF_OPENGL_ES
glDrawElements(GL_LINES, 2, GL_UNSIGNED_SHORT, linesConnects);
#else
glDrawRangeElements(GL_LINES, 0, 4, 2, GL_UNSIGNED_SHORT, linesConnects);
#endif
}
}
glDisableVertexAttribArray(ShaderProgram::VERTEX);
CVF_TIGHT_ASSERT(shaderProgram.notNull());
shaderProgram->useNoProgram(oglContext);
// Reset render states
Depth resetDepth;
resetDepth.applyOpenGL(oglContext);
CVF_CHECK_OGL(oglContext);
}
//--------------------------------------------------------------------------------------------------
/// Render a semi transparent background frame
//--------------------------------------------------------------------------------------------------
void InternalLegendRenderTools::renderBackgroundUsingShaders(OpenGLContext* oglContext,
const MatrixState& matrixState,
const Vec2f& size,
const Color4f& backgroundColor,
const Color4f& backgroundFrameColor)
{
CVF_CALLSITE_OPENGL(oglContext);
RenderStateDepth depth(false);
depth.applyOpenGL(oglContext);
RenderStateLine line(1.0f);
line.applyOpenGL(oglContext);
RenderStateBlending blend;
blend.configureTransparencyBlending();
blend.applyOpenGL(oglContext);
// Shader program
ref<ShaderProgram> shaderProgram = oglContext->resourceManager()->getLinkedUnlitColorShaderProgram(oglContext);
CVF_TIGHT_ASSERT(shaderProgram.notNull());
if (shaderProgram->useProgram(oglContext))
{
shaderProgram->clearUniformApplyTracking();
shaderProgram->applyFixedUniforms(oglContext, matrixState);
}
std::array<Vec3f, 4> vertexArray ={
Vec3f(1 , 1, 0.0f),
Vec3f(size.x(), 1, 0.0f),
Vec3f(size.x(), size.y(), 0.0f),
Vec3f(1 , size.y(), 0.0f),
};
glBindBuffer(GL_ARRAY_BUFFER, 0);
glEnableVertexAttribArray(ShaderProgram::VERTEX);
glVertexAttribPointer(ShaderProgram::VERTEX, 3, GL_FLOAT, GL_FALSE, 0, vertexArray.data());
// Draw frame background
UniformFloat backgroundColorUniform("u_color", backgroundColor);
shaderProgram->applyUniform(oglContext, backgroundColorUniform);
// Triangle indices for the frame background
static const ushort backgroundTriangleIndices[] = { 0, 1, 2, 2, 3, 0};
glDrawRangeElements(GL_TRIANGLES, 0, 3, 6, GL_UNSIGNED_SHORT, backgroundTriangleIndices);
// Draw frame border lines
UniformFloat uniformColor("u_color", backgroundFrameColor);
shaderProgram->applyUniform(oglContext, uniformColor);
static const ushort frameLineIndices[] = { 0, 1,
1, 2,
2, 3,
3, 0 };
glDrawRangeElements(GL_LINES, 0, 3, 8, GL_UNSIGNED_SHORT, frameLineIndices);
glDisableVertexAttribArray(ShaderProgram::VERTEX);
CVF_TIGHT_ASSERT(shaderProgram.notNull());
shaderProgram->useNoProgram(oglContext);
// Reset render states
RenderStateDepth resetDepth;
resetDepth.applyOpenGL(oglContext);
RenderStateLine resetLine;
resetLine.applyOpenGL(oglContext);
RenderStateBlending resetblend;
resetblend.applyOpenGL(oglContext);
CVF_CHECK_OGL(oglContext);
}