void Shape::DrawRectangle(const Rect& rect, float rotation, const Color& color)
{
float xy[] =
{
rect.left, rect.top,
rect.left + rect.width, rect.top,
rect.left + rect.width, rect.top + rect.height,
rect.left, rect.top + rect.height
};
if (rotation != 0)
{
const float centerX = rect.left + rect.width * 0.5f;
const float centerY = rect.top + rect.height * 0.5f;
const float rotationSin = sinf(rotation);
const float rotationCos = cosf(rotation);
for (unsigned int i = 0; i < 4 * 2; i += 2)
Vertex_Rotate(xy[i], xy[i + 1], centerX, centerY, rotationSin, rotationCos);
}
Shape::DrawParams params;
params.color = color;
params.SetNumVerts(4);
params.SetGeometryType(Geometry::Type_TriangleFan);
params.SetPosition(xy);
Shape::Draw(¶ms);
}
void Shape::DrawLines(const Vec2* xy, int count, const Color& color)
{
Shape::DrawParams params;
params.color = color;
params.SetNumVerts(count * 2);
params.SetGeometryType(Geometry::Type_Lines);
params.SetPosition(xy);
Shape::Draw(¶ms);
}
void Shape::DrawLine(const Vec2& point0, const Vec2& point1, const Color& color)
{
const Vec2 points[] = {point0, point1};
Shape::DrawParams params;
params.color = color;
params.SetNumVerts(2);
params.SetGeometryType(Geometry::Type_Lines);
params.SetPosition(points);
Shape::Draw(¶ms);
}
void Shape::DrawCircle(const Vec2& center, float radius, int numSegments, float rotation, const Color& color)
{
std::vector<Vec2> xy(numSegments);
float angle = rotation;
const float angleStep = 3.141592654f * 2.0f / (float) numSegments;
for (unsigned int i = 0; i < xy.size(); i++)
{
xy[i] = Vec2(
sinf(angle) * radius + center.x,
cosf(angle) * radius + center.y);
angle += angleStep;
}
Shape::DrawParams params;
params.color = color;
params.SetNumVerts(numSegments);
params.SetGeometryType(Geometry::Type_TriangleFan);
params.SetPosition(&xy[0]);
Shape::Draw(¶ms);
}
void Font_Draw(FontObj* font, const Text::DrawParams* params)
{
// Convert to UTF32
unsigned int buffer[1024];
unsigned int bufferSize = ARRAYSIZE(buffer);
if (!UTF8ToUTF32((const unsigned char*) params->text.c_str(), params->text.length(), buffer, bufferSize))
return;
// Make sure all glyphs are present
Font_CacheGlyphs(font, buffer, bufferSize);
// Generate positions and uvs for the text
if (!font->texture)
return;
const float scale = params->scale;
std::vector<float> xy;
std::vector<float> uv;
float x = params->position.x;
float y = params->position.y;
for (unsigned int i = 0; i < bufferSize; i++)
{
if (buffer[i] == '\r')
continue;
if (buffer[i] == '\n')
{
y += (float) font->size * scale;
x = params->position.x;
continue;
}
Glyph* glyph = map_find(font->glyphs, buffer[i]);
if (!glyph)
continue;
uv.push_back(glyph->uv.left); uv.push_back(glyph->uv.top);
uv.push_back(glyph->uv.left + glyph->uv.width); uv.push_back(glyph->uv.top);
uv.push_back(glyph->uv.left + glyph->uv.width); uv.push_back(glyph->uv.top + glyph->uv.height);
uv.push_back(glyph->uv.left); uv.push_back(glyph->uv.top + glyph->uv.height);
uv.push_back(*(uv.end() - 8)); uv.push_back(*(uv.end() - 8));
uv.push_back(*(uv.end() - 6)); uv.push_back(*(uv.end() - 6));
xy.push_back(x + glyph->pos.left * scale); xy.push_back(y + glyph->pos.top * scale);
xy.push_back(x + (glyph->pos.left + glyph->pos.width) * scale); xy.push_back(y + glyph->pos.top * scale);
xy.push_back(x + (glyph->pos.left + glyph->pos.width) * scale); xy.push_back(y + (glyph->pos.top + glyph->pos.height) * scale);
xy.push_back(x + glyph->pos.left * scale); xy.push_back(y + (glyph->pos.top + glyph->pos.height) * scale);
xy.push_back(*(xy.end() - 8)); xy.push_back(*(xy.end() - 8));
xy.push_back(*(xy.end() - 6)); xy.push_back(*(xy.end() - 6));
x += glyph->advancePos * scale;
}
// Determine mins and maxes of the text
float minX = (float) INT_MAX, maxX = (float) INT_MIN, minY = (float) INT_MAX, maxY = (float) INT_MIN;
for (unsigned int i = 0; i < xy.size(); i += 2)
{
minX = min(minX, xy[i]);
maxX = max(maxX, xy[i]);
minY = min(minY, xy[i + 1]);
maxY = max(maxY, xy[i + 1]);
}
// Determine the center of the text
float centerX = 0.0f, centerY = 0.0f;
if (params->width == 0.0f || params->height == 0.0f)
{
centerX = (minX + maxX) * 0.5f;
centerY = (minY + maxY) * 0.5f;
}
else
{
centerX = params->position.x + params->width * 0.5f;
centerY = params->position.y + params->height * 0.5f;
}
// Align the text
switch (params->horizontalAlignment)
{
case Text::HorizontalAlignment_Center:
{
const float offset = params->position.x + params->width * 0.5f - (minX + maxX) * 0.5f;
for (unsigned int i = 0; i < xy.size(); i += 2)
xy[i] += offset;
break;
}
case Text::HorizontalAlignment_Right:
{
const float offset = params->position.x + params->width - maxX;
for (unsigned int i = 0; i < xy.size(); i += 2)
xy[i] += offset;
break;
}
default:
//case Text::HorizontalAlignment_Left
:
break;
}
switch (params->verticalAlignment)
{
case Text::VerticalAlignment_Center:
{
const float offset = params->position.y + params->height * 0.5f - (minY + maxY) * 0.5f;
for (unsigned int i = 1; i < xy.size(); i += 2)
xy[i] += offset;
break;
}
case Text::VerticalAlignment_Bottom:
{
const float offset = params->position.y + params->height - maxY;
for (unsigned int i = 1; i < xy.size(); i += 2)
xy[i] += offset;
break;
}
default:
//case Text::VerticalAlignment_Top:
break;
}
// Set up draw params
Shape::DrawParams texParams;
texParams.SetGeometryType(Shape::Geometry::Type_Triangles);
texParams.SetNumVerts(xy.size() / 2);
texParams.SetTexCoord(&uv[0]);
// Draw shadow
if (params->drawShadow)
{
// Offset verts for the shadow rendering
std::vector<float> xyShadow = xy;
for (unsigned int i = 0; i < xyShadow.size(); i += 2)
{
xyShadow[i] += params->shadowOffset.x;
xyShadow[i + 1] += params->shadowOffset.y;
}
// Rotate the shadow text
if (params->rotation != 0)
{
const float rotationSin = sinf(params->rotation);
const float rotationCos = cosf(params->rotation);
for (unsigned int i = 0; i < xyShadow.size(); i += 2)
Vertex_Rotate(xyShadow[i], xyShadow[i + 1], centerX, centerY, rotationSin, rotationCos);
}
// Draw the shadow
texParams.color = params->shadowColor;
texParams.SetPosition(&xyShadow[0]);
Texture_Draw(font->texture, &texParams);
}
// Rotate the text
if (params->rotation != 0)
{
const float rotationSin = sinf(params->rotation);
const float rotationCos = cosf(params->rotation);
for (unsigned int i = 0; i < xy.size(); i += 2)
Vertex_Rotate(xy[i], xy[i + 1], centerX, centerY, rotationSin, rotationCos);
}
// Draw
texParams.color = params->color;
texParams.SetPosition(&xy[0]);
Texture_Draw(font->texture, &texParams);
}
void Postprocessing_DrawRainyGlass(Texture& renderTarget, Texture& scene)
{
Texture dropletTarget = RenderTexturePool::Get(256, 256);
// Clear droplet render target to default front-facing direction
const Color frontClearColor(0.5f /* x == 0 */, 0.5f /* y = 0 */, 1.0f /* z = 1 */, 0.0f);
dropletTarget.BeginDrawing(&frontClearColor);
// Evaporation
if (rain->dropletBuffer.IsValid())
{
if (rain->rainEvaporation > 0.02f) // Apply rain evaporation
{
rain->material.SetTechnique("rain_evaporation");
rain->rainEvaporation = 0;
}
else // Just copy previous buffer (skip evaporation step this time)
{
rain->material.SetTechnique("copy_texture");
}
rain->material.SetTextureParameter("ColorMap", rain->dropletBuffer, Sampler::DefaultPostprocess);
rain->material.DrawFullscreenQuad();
}
// Droplets
const Vec2 sizeScale( (float) dropletTarget.GetWidth(), (float) dropletTarget.GetHeight() );
while (rain->deltaTime > 0.0f)
{
const float stepDeltaTime = min(rain->deltaTime, 1 / 60.0f);
rain->deltaTime -= stepDeltaTime;
Postprocessing_UpdateRainyGlassStep(stepDeltaTime);
const unsigned int numDroplets = rain->droplets.size();
if (!numDroplets)
continue;
std::vector<Vec2> verts(numDroplets * 4);
std::vector<Vec2> tex(numDroplets * 4);
std::vector<unsigned short> indices(numDroplets * 6);
int currVertexIndex = 0;
unsigned short* currIndex = &indices[0];
std::vector<RainyGlass::Droplet>::iterator dropletsEnd = rain->droplets.end();
for (std::vector<RainyGlass::Droplet>::iterator it = rain->droplets.begin(); it != dropletsEnd; ++it)
{
Vec2 size = Vec2(it->size, it->size);
Vec2 pos = it->pos - size * 0.5f;
size *= sizeScale;
pos *= sizeScale;
Vec2* currVertex = &verts[currVertexIndex];
*(currVertex++) = pos;
*(currVertex++) = pos + Vec2(size.x, 0.0f);
*(currVertex++) = pos + size;
*(currVertex++) = pos + Vec2(0.0f, size.y);
Vec2* currTex = &tex[currVertexIndex];
(currTex++)->Set(0.0f, 0.0f);
(currTex++)->Set(1.0f, 0.0f);
(currTex++)->Set(1.0f, 1.0f);
(currTex++)->Set(0.0f, 1.0f);
*(currIndex++) = currVertexIndex;
*(currIndex++) = currVertexIndex + 1;
*(currIndex++) = currVertexIndex + 2;
*(currIndex++) = currVertexIndex;
*(currIndex++) = currVertexIndex + 2;
*(currIndex++) = currVertexIndex + 3;
currVertexIndex += 4;
}
Shape::DrawParams drawParams;
drawParams.SetGeometryType(Shape::Geometry::Type_Triangles);
drawParams.SetNumVerts(verts.size());
drawParams.SetPosition(&verts[0], sizeof(Vec2));
drawParams.SetTexCoord(&tex[0], 0, sizeof(Vec2));
drawParams.SetIndices(indices.size(), &indices[0]);
Material& defaultMaterial = App::GetDefaultMaterial();
defaultMaterial.SetTechnique("tex_col");
defaultMaterial.SetFloatParameter("Color", (const float*) &Color::White, 4);
defaultMaterial.SetTextureParameter("ColorMap", rain->dropletTexture);
defaultMaterial.Draw(&drawParams);
}
dropletTarget.EndDrawing();
// Swap droplet buffer
if (rain->dropletBuffer.IsValid())
RenderTexturePool::Release(rain->dropletBuffer);
rain->dropletBuffer = dropletTarget;
// Apply droplet buffer distortion to scene
renderTarget.BeginDrawing();
Sampler colorSampler = Sampler::DefaultPostprocess;
colorSampler.minFilterLinear = true;
colorSampler.magFilterLinear = true;
rain->material.SetTechnique("rain_distortion");
rain->material.SetFloatParameter("DropletColor", (const float*) &rain->dropletColor, 4);
rain->material.SetTextureParameter("ColorMap", scene, colorSampler);
rain->material.SetTextureParameter("NormalMap", rain->dropletBuffer);
rain->material.DrawFullscreenQuad();
renderTarget.EndDrawing();
}
