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thedmdthedmd
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Rendering experiments
1 parent aebc1a4 commit 490aa84

10 files changed

+911
-432
lines changed

‎ascii-render.vcxproj

+38-9
Original file line numberDiff line numberDiff line change
@@ -22,32 +22,32 @@
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<ProjectGuid>{8210BE36-4F8D-4CDA-BA18-5D0A55A072F4}</ProjectGuid>
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<Keyword>Win32Proj</Keyword>
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<RootNamespace>asciirender</RootNamespace>
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<WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
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<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<PlatformToolset>v143</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<PlatformToolset>v143</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<PlatformToolset>v143</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<PlatformToolset>v143</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
@@ -89,14 +89,21 @@
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<Optimization>Disabled</Optimization>
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<PreprocessorDefinitions>WIN32;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
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<AdditionalIncludeDirectories>$(DXSDK_DIR)\Include\</AdditionalIncludeDirectories>
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<AdditionalIncludeDirectories>
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</AdditionalIncludeDirectories>
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<OpenMPSupport>true</OpenMPSupport>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<LanguageStandard>stdcpp20</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<AdditionalLibraryDirectories>$(DXSDK_DIR)\Lib\x86\</AdditionalLibraryDirectories>
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<EntryPointSymbol>wmainCRTStartup</EntryPointSymbol>
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</Link>
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<Manifest>
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<EnableDpiAwareness>PerMonitorHighDPIAware</EnableDpiAwareness>
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</Manifest>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
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<ClCompile>
@@ -106,14 +113,21 @@
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<Optimization>Disabled</Optimization>
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<PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
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<AdditionalIncludeDirectories>$(DXSDK_DIR)\Include\</AdditionalIncludeDirectories>
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<AdditionalIncludeDirectories>
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</AdditionalIncludeDirectories>
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<OpenMPSupport>true</OpenMPSupport>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<LanguageStandard>stdcpp20</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<AdditionalLibraryDirectories>$(DXSDK_DIR)\Lib\x64\</AdditionalLibraryDirectories>
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<EntryPointSymbol>wmainCRTStartup</EntryPointSymbol>
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</Link>
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<Manifest>
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<EnableDpiAwareness>PerMonitorHighDPIAware</EnableDpiAwareness>
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</Manifest>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<ClCompile>
@@ -125,7 +139,10 @@
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<PreprocessorDefinitions>WIN32;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
128-
<AdditionalIncludeDirectories>$(DXSDK_DIR)\Include\</AdditionalIncludeDirectories>
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<AdditionalIncludeDirectories>
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</AdditionalIncludeDirectories>
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<OpenMPSupport>true</OpenMPSupport>
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<LanguageStandard>stdcpp20</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
@@ -135,6 +152,9 @@
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<AdditionalLibraryDirectories>$(DXSDK_DIR)\Lib\x86\</AdditionalLibraryDirectories>
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<EntryPointSymbol>wmainCRTStartup</EntryPointSymbol>
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</Link>
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<Manifest>
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<EnableDpiAwareness>PerMonitorHighDPIAware</EnableDpiAwareness>
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</Manifest>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
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<ClCompile>
@@ -146,7 +166,10 @@
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
149-
<AdditionalIncludeDirectories>$(DXSDK_DIR)\Include\</AdditionalIncludeDirectories>
169+
<AdditionalIncludeDirectories>
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</AdditionalIncludeDirectories>
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<OpenMPSupport>true</OpenMPSupport>
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<LanguageStandard>stdcpp20</LanguageStandard>
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</ClCompile>
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<Link>
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<SubSystem>Windows</SubSystem>
@@ -156,6 +179,9 @@
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<AdditionalLibraryDirectories>$(DXSDK_DIR)\Lib\x64\</AdditionalLibraryDirectories>
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<EntryPointSymbol>wmainCRTStartup</EntryPointSymbol>
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</Link>
182+
<Manifest>
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<EnableDpiAwareness>PerMonitorHighDPIAware</EnableDpiAwareness>
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</Manifest>
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</ItemDefinitionGroup>
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<ItemGroup>
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<ClCompile Include="drawing.cpp" />
@@ -189,6 +215,9 @@
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<ItemGroup>
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<None Include="math.inl" />
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</ItemGroup>
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<ItemGroup>
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<Natvis Include="support\ascii-render.natvis" />
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</ItemGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>

‎ascii-render.vcxproj.filters

+8
Original file line numberDiff line numberDiff line change
@@ -19,6 +19,9 @@
1919
<Filter Include="mesh">
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<UniqueIdentifier>{317dece4-ddc7-4381-8928-8967e84d50c8}</UniqueIdentifier>
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</Filter>
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<Filter Include="support">
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<UniqueIdentifier>{51b45bd5-73b2-4f4d-8bf1-f8536330e040}</UniqueIdentifier>
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</Filter>
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="toaster\PixelToaster.cpp">
@@ -102,4 +105,9 @@
102105
<Filter>math</Filter>
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</None>
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</ItemGroup>
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<ItemGroup>
109+
<Natvis Include="support\ascii-render.natvis">
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<Filter>support</Filter>
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</Natvis>
112+
</ItemGroup>
105113
</Project>

‎drawing.cpp

+64
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,8 @@
11
#include "drawing.h"
22
#include <algorithm>
33

4+
using std::min;
5+
using std::max;
46
template <typename T> static inline T min(T a, T b, T c) { return std::min(a, std::min(b, c)); }
57
template <typename T> static inline T max(T a, T b, T c) { return std::max(a, std::max(b, c)); }
68

@@ -465,6 +467,7 @@ void generic_triangle_3d(framebuffer_t& buffer,
465467
int CX1 = CY1 - FDY12 * offset_x;
466468
int CX2 = CY2 - FDY20 * offset_x;
467469

470+
//#pragma omp parallel for
468471
for (int x = minx; x < maxx; x++)
469472
{
470473
{
@@ -488,3 +491,64 @@ void generic_triangle_3d(framebuffer_t& buffer,
488491
CY2 += FDX20;
489492
}
490493
}
494+
495+
void generic_line_3d(framebuffer_t& buffer,
496+
float x0, float y0, float z0,
497+
float x1, float y1, float z1,
498+
float c0, float c1)
499+
{
500+
// 28.4 fixed-point coordinates
501+
int X0 = (int)(x0 * 16.0f);
502+
int X1 = (int)(x1 * 16.0f);
503+
int Y0 = (int)(y0 * 16.0f);
504+
int Y1 = (int)(y1 * 16.0f);
505+
506+
// 8.24 fixed-point coordinate
507+
int Z0 = (int)(1.0f / z0 * 0x1000000);
508+
int Z1 = (int)(1.0f / z1 * 0x1000000);
509+
510+
// Swap X/Y if Y is major axis, so X is always major axis
511+
const auto flip = abs(Y1 - Y0) > abs(X1 - X0);
512+
if (flip)
513+
{
514+
std::swap(X0, Y0);
515+
std::swap(X1, Y1);
516+
}
517+
518+
// Always draw left to right
519+
if (X0 > X1)
520+
{
521+
std::swap(X0, X1);
522+
std::swap(Y0, Y1);
523+
std::swap(Z0, Z1);
524+
std::swap(c0, c1);
525+
}
526+
527+
const auto ONE = 16; // sub-pixel precission
528+
const auto DX = X1 - X0;
529+
const auto DY = abs(Y1 - Y0);
530+
const auto step = Y0 < Y1 ? 1 : -1;
531+
532+
auto error = ONE * DX / 2;
533+
auto Y = Y0;
534+
535+
for (int X = X0; X < X1; X += ONE)
536+
{
537+
int Z = Z0 + (Z1 - Z0) * (X - X0) / DX; // 1/z in 8.24 fixed-point coordinate
538+
539+
auto z = 1.0f / (Z * (1.0f / 0x1000000)); // reconstruct z
540+
auto c = c0 + (c1 - c0) * (X - X0) / DX; // interpolate color
541+
542+
if (flip)
543+
buffer.set(Y >> 4, X >> 4, z, c); // draw pixel (x and y are swapped)
544+
else
545+
buffer.set(X >> 4, Y >> 4, z, c); // draw pixel
546+
547+
error = error - DY * ONE;
548+
while (error < 0)
549+
{
550+
Y += step;
551+
error += DX;
552+
}
553+
}
554+
}

‎drawing.h

+18-2
Original file line numberDiff line numberDiff line change
@@ -22,6 +22,11 @@ void generic_triangle_3d(framebuffer_t& buffer,
2222
float x2, float y2, float z2,
2323
float c0, float c1, float c2);
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25+
void generic_line_3d(framebuffer_t& buffer,
26+
float x0, float y0, float z0,
27+
float x1, float y1, float z1,
28+
float c0, float c1);
29+
2530
struct image_t
2631
{
2732
const uint8_t* data;
@@ -71,16 +76,21 @@ struct framebuffer_t
7176

7277
void set(int x, int y, float c)
7378
{
74-
set_color(x, y, c);
79+
if (!clip(x, y))
80+
set_color(x, y, c);
7581
}
7682

7783
void blend(int x, int y, float c, float a)
7884
{
79-
blend_color(x, y, c, a);
85+
if (!clip(x, y))
86+
blend_color(x, y, c, a);
8087
}
8188

8289
void set(int x, int y, float z, float c)
8390
{
91+
if (clip(x, y))
92+
return;
93+
8494
auto& d = depth[width * y + x];
8595
if (z > d)
8696
return;
@@ -111,5 +121,11 @@ struct framebuffer_t
111121
virtual void blend_color(int x, int y, float c, float a) = 0;
112122
virtual void commit_impl() = 0;
113123
virtual void present_impl() = 0;
124+
125+
private:
126+
bool clip(int x, int y) const
127+
{
128+
return x < 0 || y < 0 || x >= width || y >= height;
129+
}
114130
};
115131

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