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raycast_legacy.pas
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raycast_legacy.pas
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unit raycast_legacy;
{$IFNDEF FPC} {$D-,L-,Y-}{$ENDIF}
{$O+,Q-,R-,S-}
{$IFDEF FPC}{$mode objfpc}{$H+}{$ENDIF}
// Inspired by Peter Trier http://www.daimi.au.dk/~trier/?page_id=98
// Philip Rideout http://prideout.net/blog/?p=64
// and Doyub Kim Jan 2009 http://www.doyub.com/blog/759
// Ported to Pascal by Chris Rorden Apr 2011
// Tips for Shaders from
// http://pages.cs.wisc.edu/~nowak/779/779ClassProject.html#bound
interface
{$include opts.inc}
uses
{$IFDEF FPC}
{$IFDEF UNIX} LCLIntf,{$ELSE} Windows, {$ENDIF}
graphtype,
{$ELSE}
Windows,
{$ENDIF}
{$IFDEF ENABLEWATERMARK}watermark,{$ENDIF}
{$IFDEF USETRANSFERTEXTURE}texture_3d_unit_transfertexture, {$ELSE} texture_3d_unit,{$ENDIF}
graphics,
{$IFDEF DGL} dglOpenGL, {$ELSE DGL} {$IFDEF COREGL}glcorearb, {$ELSE} gl,glext, {$ENDIF} {$ENDIF DGL}
define_types,
sysutils, histogram2d, math, raycast_common;
procedure DisplayGLz(var lTex: TTexture; zoom, zoomOffsetX, zoomOffsetY: integer; framebuff: GLUint; isTiled: boolean);
procedure InitGL (InitialSetup: boolean);// (var lTex: TTexture);
procedure DisplayRender(var lTex: TTexture; lX,lY,lW,lH: single; lOrient: integer);
procedure DisplayGL(var lTex: TTexture);
implementation
uses
shaderu, mainunit,slices2d;
//this GLSL shader will blur data
const kSmoothShaderFrag = 'uniform float coordZ, dX, dY, dZ;'
+#10'uniform sampler3D intensityVol;'
+#10'void main(void) {'
+#10' vec3 vx = vec3(gl_TexCoord[0].xy, coordZ);'
+#10' vec4 samp = texture3D(intensityVol,vx+vec3(+dX,+dY,+dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(+dX,+dY,-dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(+dX,-dY,+dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(+dX,-dY,-dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(-dX,+dY,+dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(-dX,+dY,-dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(-dX,-dY,+dZ));'
+#10' samp += texture3D(intensityVol,vx+vec3(-dX,-dY,-dZ));'
+#10' gl_FragColor = samp*0.125;'
+#10'}';
//this will estimate a Sobel smooth
const kSobelShaderFrag = 'uniform float coordZ, dX, dY, dZ;'
+#10'uniform sampler3D intensityVol;'
+#10'void main(void) {'
+#10' vec3 vx = vec3(gl_TexCoord[0].xy, coordZ);'
+#10' float TAR = texture3D(intensityVol,vx+vec3(+dX,+dY,+dZ)).a;'
+#10' float TAL = texture3D(intensityVol,vx+vec3(+dX,+dY,-dZ)).a;'
+#10' float TPR = texture3D(intensityVol,vx+vec3(+dX,-dY,+dZ)).a;'
+#10' float TPL = texture3D(intensityVol,vx+vec3(+dX,-dY,-dZ)).a;'
+#10' float BAR = texture3D(intensityVol,vx+vec3(-dX,+dY,+dZ)).a;'
+#10' float BAL = texture3D(intensityVol,vx+vec3(-dX,+dY,-dZ)).a;'
+#10' float BPR = texture3D(intensityVol,vx+vec3(-dX,-dY,+dZ)).a;'
+#10' float BPL = texture3D(intensityVol,vx+vec3(-dX,-dY,-dZ)).a;'
+#10' vec4 gradientSample = vec4 (0.0, 0.0, 0.0, 0.0);'
+#10' gradientSample.r = BAR+BAL+BPR+BPL -TAR-TAL-TPR-TPL;'
+#10' gradientSample.g = TPR+TPL+BPR+BPL -TAR-TAL-BAR-BAL;'
+#10' gradientSample.b = TAL+TPL+BAL+BPL -TAR-TPR-BAR-BPR;'
+#10' gradientSample.a = (abs(gradientSample.r)+abs(gradientSample.g)+abs(gradientSample.b))*0.29;'
+#10' gradientSample.rgb = normalize(gradientSample.rgb);'
+#10' gradientSample.rgb = (gradientSample.rgb * 0.5)+0.5;'
+#10' gl_FragColor = gradientSample;'
+#10'}';
//the gradientSample.a coefficient is critical - 0.25 is technically correct, 0.29 better emulates CPU (where we normalize alpha values in the whole volume)
(*const kMinimalShaderFrag = 'uniform float coordZ, dX, dY, dZ;'
+#10'uniform sampler3D intensityVol;'
+#10'void main(void){'
+#10' gl_FragColor = vec4 (0.3, 0.5, 0.7, 0.2);'
+#10'}';*)
procedure performBlurSobel(var lTex: TTexture; lIsOverlay: boolean);
//http://www.opengl-tutorial.org/intermediate-tutorials/tutorial-14-render-to-texture/
//http://www.opengl.org/wiki/Framebuffer_Object_Examples
var
i: integer;
coordZ: single; //dx
fb, tempTex3D: GLuint;
begin
glGenFramebuffersEXT(1, @fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
//glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,gRayCast.frameBuffer);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);// <- REQUIRED
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
//glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA8, lTex.FiltDim[1], lTex.FiltDim[2], 0, GL_RGBA, GL_UNSIGNED_BYTE, nil);
glViewport(0, 0, lTex.FiltDim[1], lTex.FiltDim[2]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
{$IFDEF DGL}
gluOrtho2D(0, 1, 0, 1);
{$ELSE}
glOrtho (0, 1,0, 1, -1, 1); //gluOrtho2D(0, 1, 0, 1); https://www.opengl.org/sdk/docs/man2/xhtml/gluOrtho2D.xml
{$ENDIF}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
//glDisable(GL_TEXTURE_2D);
//STEP 1: run smooth program gradientTexture -> tempTex3D
tempTex3D := bindBlankGL(lTex);
//glUseProgramObjectARB(gRayCast.glslprogramBlur);
glUseProgram(gRayCast.glslprogramBlur);
glActiveTexture( GL_TEXTURE1);
//glBindTexture(GL_TEXTURE_3D, gRayCast.gradientTexture3D);//input texture
if lIsOverlay then
glBindTexture(GL_TEXTURE_3D, gRayCast.intensityOverlay3D)//input texture is overlay
else
glBindTexture(GL_TEXTURE_3D, gRayCast.intensityTexture3D);//input texture is background
//glEnable(GL_TEXTURE_2D);
//glDisable(GL_TEXTURE_2D);
glUniform1ix(gRayCast.glslprogramBlur, 'intensityVol', 1);
//glUniform1fx(gRayCast.glslprogramBlur, 'dX', 0.5/lTex.FiltDim[1]); //0.5 for smooth - center contributes
//glUniform1fx(gRayCast.glslprogramBlur, 'dY', 0.5/lTex.FiltDim[2]);
//glUniform1fx(gRayCast.glslprogramBlur, 'dZ', 0.5/lTex.FiltDim[3]);
glUniform1fx(gRayCast.glslprogramBlur, 'dX', 0.7/lTex.FiltDim[1]); //0.5 for smooth - center contributes
glUniform1fx(gRayCast.glslprogramBlur, 'dY', 0.7/lTex.FiltDim[2]);
glUniform1fx(gRayCast.glslprogramBlur, 'dZ', 0.7/lTex.FiltDim[3]);
for i := 0 to (lTex.FiltDim[3]-1) do begin
coordZ := 1/lTex.FiltDim[3] * (i + 0.5);
glUniform1fx(gRayCast.glslprogramBlur, 'coordZ', coordZ);
//glFramebufferTexture3D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, tempTex3D, 0, i);//output texture
//Ext required: Delphi compile on Winodws 32-bit XP with NVidia 8400M
glFramebufferTexture3DExt(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, tempTex3D, 0, i);//output texture
glClear(GL_DEPTH_BUFFER_BIT); // clear depth bit (before render every layer)
glBegin(GL_QUADS);
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(1.0, 0);
glVertex2f(1.0, 0.0);
glTexCoord2f(1.0, 1.0);
glVertex2f(1.0, 1.0);
glTexCoord2f(0, 1.0);
glVertex2f(0.0, 1.0);
glEnd();
end;
glUseProgram(0);
//STEP 2: run sobel program gradientTexture -> tempTex3D
//glUseProgramObjectARB(gRayCast.glslprogramSobel);
glUseProgram(gRayCast.glslprogramSobel);
glActiveTexture(GL_TEXTURE1);
//x glBindTexture(GL_TEXTURE_3D, gRayCast.intensityTexture3D);//input texture
glBindTexture(GL_TEXTURE_3D, tempTex3D);//input texture
// glEnable(GL_TEXTURE_2D);
// glDisable(GL_TEXTURE_2D);
glUniform1ix(gRayCast.glslprogramSobel, 'intensityVol', 1);
//glUniform1fx(gRayCast.glslprogramSobel, 'dX', 1.0/lTex.FiltDim[1] ); //1.0 for SOBEL - center excluded
//glUniform1fx(gRayCast.glslprogramSobel, 'dY', 1.0/lTex.FiltDim[2]);
//glUniform1fx(gRayCast.glslprogramSobel, 'dZ', 1.0/lTex.FiltDim[3]);
glUniform1fx(gRayCast.glslprogramSobel, 'dX', 1.2/lTex.FiltDim[1] ); //1.0 for SOBEL - center excluded
glUniform1fx(gRayCast.glslprogramSobel, 'dY', 1.2/lTex.FiltDim[2]);
glUniform1fx(gRayCast.glslprogramSobel, 'dZ', 1.2/lTex.FiltDim[3]);
//for i := 0 to (dim3-1) do begin
// glColor4f(0.7,0.3,0.2, 0.7);
for i := 0 to (lTex.FiltDim[3]-1) do begin
coordZ := 1/lTex.FiltDim[3] * (i + 0.5);
glUniform1fx(gRayCast.glslprogramSobel, 'coordZ', coordZ);
(*Ext required: Delphi compile on Winodws 32-bit XP with NVidia 8400M
if lIsOverlay then
glFramebufferTexture3D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, gRayCast.gradientOverlay3D, 0, i)
else
glFramebufferTexture3D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, gRayCast.gradientTexture3D, 0, i);*)
if lIsOverlay then
glFramebufferTexture3DExt(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, gRayCast.gradientOverlay3D, 0, i)//output is overlay
else
glFramebufferTexture3DExt(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, gRayCast.gradientTexture3D, 0, i);//output is background
glClear(GL_DEPTH_BUFFER_BIT);
glBegin(GL_QUADS);
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(1.0, 0);
glVertex2f(1.0, 0.0);
glTexCoord2f(1.0, 1.0);
glVertex2f(1.0, 1.0);
glTexCoord2f(0, 1.0);
glVertex2f(0.0, 1.0);
glEnd();
end;
glUseProgram(0);
//clean up:
glDeleteTextures(1,@tempTex3D);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, @fb);
glActiveTexture( GL_TEXTURE0 ); //required if we will draw 2d slices next
end;
(*kPrefilterFrag and performPrefilter() are adapted from the following source and maintain that license
Ruijters & Thévenaz (2012) GPU Prefilter for Accurate Cubic B-spline Interpolation. The Computer Journal. 55, 1: 15-20
https://github.com/DannyRuijters/CubicInterpolationWebGL
Copyright (c) 2008-2014, DannyRuijters
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of CubicInterpolationWebGL nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*)
const kPrefilterFrag = 'uniform float coordZ;'
+#10'uniform sampler3D uSampler;'
+#10'uniform vec3 increment;'
+#10'void main(void) {'
+#10' vec3 vTextureCoord = vec3(gl_TexCoord[0].xy, coordZ);'
+#10' vec4 w = 1.732176555 * texture3D(uSampler, vTextureCoord);'
+#10' vec3 im = vTextureCoord - increment;'
+#10' vec3 ip = vTextureCoord + increment;'
+#10' w -= 0.464135309 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w += 0.124364681 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w -= 0.033323416 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w += 0.008928982 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w -= 0.002392514 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w += 0.000641072 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' im -= increment; ip += increment;'
+#10' w -= 0.000171775 * (texture3D(uSampler,im)+texture3D(uSampler,ip));'
+#10' gl_FragColor = w;'
+#10' //gl_FragColor.r = 1.0; //check it ran'
+#10' }';
procedure performPrefilter(var lTex: TTexture; srcTex: GLuint);
var
i,passXYZ: integer;
incX, incY, incZ: single;
coordZ: single;
fb, tempTex3Dx, tempTex3Dxy, inTex, outTex: GLuint;
begin
glGenFramebuffersEXT(1, @fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);// <- REQUIRED
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glViewport(0, 0, lTex.FiltDim[1], lTex.FiltDim[2]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
{$IFDEF DGL}
gluOrtho2D(0, 1, 0, 1);
{$ELSE}
glOrtho (0, 1,0, 1, -1, 1); //gluOrtho2D(0, 1, 0, 1); https://www.opengl.org/sdk/docs/man2/xhtml/gluOrtho2D.xml
{$ENDIF}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
//glDisable(GL_TEXTURE_2D);
//STEP 1: run smooth program gradientTexture -> tempTex3D
tempTex3Dx := bindBlankGL(lTex);
tempTex3Dxy := bindBlankGL(lTex);
glUseProgram(gRayCast.glslprogramPrefilter);
glUniform1ix(gRayCast.glslprogramPrefilter, 'uSampler', 1); //input texture will be GL_TEXTURE1
for passXYZ := 1 to 3 do begin
//select input texture
if passXYZ = 1 then begin
inTex := srcTex; //1st (X): Src -> tempX
outTex := tempTex3Dx;
incX:= 1/lTex.FiltDim[1]; incY:=0; incZ:=0;
end else if (passXYZ = 2) then begin
inTex := tempTex3Dx; //2nd (Y): tempX -> tempY
outTex := tempTex3Dxy;
incX:=0; incY:=1/lTex.FiltDim[2]; incZ:=0;
end else begin //(passXYZ = 3)
inTex := tempTex3Dxy; //3rd (Z): tempY -> src
outTex := srcTex;
incX:=0; incY:=0; incZ:=1/lTex.FiltDim[3];
end;
glActiveTexture( GL_TEXTURE1);
glBindTexture(GL_TEXTURE_3D, inTex);
glUniform3f(glGetUniformLocation(gRayCast.GLSLprogram, pAnsiChar('increment')), incX,incY,incZ);
for i := 0 to (lTex.FiltDim[3]-1) do begin
coordZ := 1/lTex.FiltDim[3] * (i + 0.5);
glUniform1fx(gRayCast.glslprogramPrefilter, 'coordZ', coordZ);
glFramebufferTexture3DExt(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0, GL_TEXTURE_3D, outTex, 0, i);//output texture
glClear(GL_DEPTH_BUFFER_BIT); // clear depth bit (before render every layer)
glBegin(GL_QUADS);
glTexCoord2f(0, 0);
glVertex2f(0, 0);
glTexCoord2f(1.0, 0);
glVertex2f(1.0, 0.0);
glTexCoord2f(1.0, 1.0);
glVertex2f(1.0, 1.0);
glTexCoord2f(0, 1.0);
glVertex2f(0.0, 1.0);
glEnd();
end;
end;
glUseProgram(0);
//clean up:
glDeleteTextures(1,@tempTex3Dx);
glDeleteTextures(1,@tempTex3Dxy);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, @fb);
glActiveTexture( GL_TEXTURE0 ); //required if we will draw 2d slices next
end; //pre-filter()
procedure doShaderBlurSobel (var lTex: TTexture);
var
startTime: DWord;
begin
if (not lTex.updateBackgroundGradientsGLSL) and (not lTex.updateOverlayGradientsGLSL) then exit;
if (gRayCast.glslprogramPrefilter = 0) then
gRayCast.glslprogramPrefilter := initVertFrag('',kPrefilterFrag); //initFragShader (kSmoothShaderFrag,gRayCast.glslprogramBlur);
//crapGL(lTex); exit;
if (gRayCast.glslprogramBlur = 0) then
gRayCast.glslprogramBlur := initVertFrag('',kSmoothShaderFrag); //initFragShader (kSmoothShaderFrag,gRayCast.glslprogramBlur);
if (gRayCast.glslprogramSobel = 0) then
gRayCast.glslprogramSobel := initVertFrag('',kSobelShaderFrag);
//initFragShader (kSobelShaderFrag,gRayCast.glslprogramSobel );
if (lTex.updateBackgroundGradientsGLSL) then begin
startTime := gettickcount;
performBlurSobel(lTex, false);
if (gPrefs.RayCastQuality1to10 = 10) then begin //enable bicubic
performPrefilter(lTex, gRayCast.intensityTexture3D);
performPrefilter(lTex, gRayCast.gradientTexture3D);
end;
lTex.updateBackgroundGradientsGLSL := false;
if gPrefs.Debug then
GLForm1.Caption := 'GLSL gradients '+inttostr(gettickcount-startTime)+' ms ';
end;
if (lTex.updateOverlayGradientsGLSL) then begin
performBlurSobel(lTex, true);
if (gPrefs.RayCastQuality1to10 = 10) then begin //enable bicubic
performPrefilter(lTex, gRayCast.intensityOverlay3D);
performPrefilter(lTex, gRayCast.gradientOverlay3D);
end;
lTex.updateOverlayGradientsGLSL := false;
end;
end;
procedure enableRenderbuffers;
begin
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, gRayCast.frameBuffer);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, gRayCast.renderBuffer);
end;
procedure disableRenderBuffers (framebuff: GLUint);
begin
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuff);
end;
procedure drawVertex(x,y,z: single);
begin
glColor3f(x,y,z);
glMultiTexCoord3f(GL_TEXTURE1, x, y, z);
glVertex3f(x,y,z);
end;
procedure drawQuads(x,y,z: single);
//x,y,z typically 1.
// useful for clipping
// If x=0.5 then only left side of texture drawn
// If y=0.5 then only posterior side of texture drawn
// If z=0.5 then only inferior side of texture drawn
begin
glBegin(GL_QUADS);
//* Back side
glNormal3f(0.0, 0.0, -1.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(0.0, y, 0.0);
drawVertex(x, y, 0.0);
drawVertex(x, 0.0, 0.0);
//* Front side
glNormal3f(0.0, 0.0, 1.0);
drawVertex(0.0, 0.0, z);
drawVertex(x, 0.0, z);
drawVertex(x, y, z);
drawVertex(0.0, y, z);
//* Top side
glNormal3f(0.0, 1.0, 0.0);
drawVertex(0.0, y, 0.0);
drawVertex(0.0, y, z);
drawVertex(x, y, z);
drawVertex(x, y, 0.0);
//* Bottom side
glNormal3f(0.0, -1.0, 0.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(x, 0.0, 0.0);
drawVertex(x, 0.0, z);
drawVertex(0.0, 0.0, z);
//* Left side
glNormal3f(-1.0, 0.0, 0.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(0.0, 0.0, z);
drawVertex(0.0, y, z);
drawVertex(0.0, y, 0.0);
//* Right side
glNormal3f(1.0, 0.0, 0.0);
drawVertex(x, 0.0, 0.0);
drawVertex(x, y, 0.0);
drawVertex(x, y, z);
drawVertex(x, 0.0, z);
glEnd();
end;
function LoadStr (lFilename: string): string;
var
myFile : TextFile;
text : string;
begin
result := '';
if not fileexistsEX(lFilename) then begin
showDebug('Unable to find or open '+lFilename);
//GLForm1.ShowmessageError('Unable to find '+lFilename);
exit;
end;
FileMode := fmOpenRead;
AssignFile(myFile,lFilename);
Reset(myFile);
while not Eof(myFile) do begin
ReadLn(myFile, text);
result := result+text+#13#10;
end;
CloseFile(myFile);
end;
procedure reshapeOrtho(w,h: integer);
begin
if (h = 0) then h := 1;
glViewport(0, 0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
{$IFDEF DGL}
gluOrtho2D(0, 1, 0, 1.0);
{$ELSE}
glOrtho (0, 1,0, 1, -1, 1); //https://www.opengl.org/sdk/docs/man2/xhtml/gluOrtho2D.xml
{$ENDIF}
glMatrixMode(GL_MODELVIEW);//?
end;
{$IFNDEF DGL} //gl does not link to the glu functions, so we will write our own
procedure gluPerspective (fovy, aspect, zNear, zFar: single);
//https://www.opengl.org/sdk/docs/man2/xhtml/gluPerspective.xml
var
i, j : integer;
f: single;
m : array [0..3, 0..3] of single;
begin
for i := 0 to 3 do
for j := 0 to 3 do
m[i,j] := 0;
f := cot(degtorad(fovy)/2);
m[0,0] := f/aspect;
m[1,1] := f;
m[2,2] := (zFar+zNear)/(zNear-zFar) ;
m[3,2] := (2*zFar*zNear)/(zNear-zFar);
m[2,3] := -1;
//m[2,3] := (2*zFar*zNear)/(zNear-zFar);
//m[2,2] := -1;
//glLoadMatrixf(@m[0,0]);
glMultMatrixf(@m[0,0]);
//raise an exception if zNear = 0??
end;
{$ENDIF}
procedure resizeGL(w,h, zoom, zoomOffsetX, zoomOffsetY: integer);
var
whratio,scale: single;
begin
if (h = 0) then
h := 1;
if zoom > 1 then
glViewport(zoomOffsetX, zoomOffsetY, w*zoom, h*zoom)
else
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if gPrefs.Perspective then
gluPerspective(40.0, w/h, 0.01, kMaxDistance)
else begin
if gRayCast.Distance = 0 then
scale := 1
else
scale := 1/abs(kDefaultDistance/(gRayCast.Distance+1.0));
whratio := w/h;
glOrtho(whratio*-0.5*scale,whratio*0.5*scale,-0.5*scale,0.5*scale, 0.01, kMaxDistance);
end;
glMatrixMode(GL_MODELVIEW);//?
end;
procedure InitGL (InitialSetup: boolean);// (var lTex: TTexture);
begin
glEnable(GL_CULL_FACE);
glClearColor(gPrefs.BackColor.rgbRed/255,gPrefs.BackColor.rgbGreen/255,gPrefs.BackColor.rgbBlue/255, 0);
if (gRayCast.glslprogram <> 0) then begin glDeleteProgram(gRayCast.glslprogram); gRayCast.glslprogram := 0; end;
gRayCast.glslprogram := initVertFrag(gShader.VertexProgram, gShader.FragmentProgram);
if (gRayCast.glslprogram = 0) then begin //error: load default shader
LoadShader('', gShader);
gRayCast.glslprogram := initVertFrag(gShader.VertexProgram, gShader.FragmentProgram);
end;
getUniformLocations;
// Create the to FBO's one for the backside of the volumecube and one for the finalimage rendering
if InitialSetup then begin
glGenFramebuffersEXT(1, @gRayCast.frameBuffer);
glGenTextures(1, @gRayCast.backFaceBuffer);
glGenTextures(1, @gRayCast.finalImage);
glGenRenderbuffersEXT(1, @gRayCast.renderBuffer);
gShader.Vendor:= gpuReport;
end;
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT,gRayCast.frameBuffer);
glBindTexture(GL_TEXTURE_2D, gRayCast.backFaceBuffer);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB, gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT, 0, GL_RGBA, GL_FLOAT, nil);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, gRayCast.backFaceBuffer, 0);
glBindTexture(GL_TEXTURE_2D, gRayCast.finalImage);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
glTexImage2D(GL_TEXTURE_2D, 0,GL_RGBA16F_ARB, gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT, 0, GL_RGBA, GL_FLOAT, nil);
//These next lines moved to DisplayGZz for VirtualBox compatibility
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, gRayCast.renderBuffer);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, gRayCast.renderBuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
end;
procedure drawUnitQuad;
//stretches image in view space.
begin
glDisable(GL_DEPTH_TEST);
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex2f(0,0);
glTexCoord2f(1,0);
glVertex2f(1,0);
glTexCoord2f(1, 1);
glVertex2f(1, 1);
glTexCoord2f(0, 1);
glVertex2f(0, 1);
glEnd();
glEnable(GL_DEPTH_TEST);
end;
// display the final image on the screen
procedure renderBufferToScreen;
begin
glClear( GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT );
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,gRayCast.finalImage);
//use next line instead of previous to illustrate one-pass rendering
//glBindTexture(GL_TEXTURE_2D,backFaceBuffer)
reshapeOrtho(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
drawUnitQuad();
glDisable(GL_TEXTURE_2D);
end;
// render the backface to the offscreen buffer backFaceBuffer
procedure renderBackFace(var lTex: TTexture; var backFace: GLuint);
begin
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, backFace, 0);
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT );
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
//glMatrixMode(GL_MODELVIEW);
//glScalef(lTex.Scale[1],lTex.Scale[2],lTex.Scale[3]);
drawQuads(1.0,1.0,1.0);
glDisable(GL_CULL_FACE);
end;
procedure drawFrame(x,y,z: single);
//x,y,z typically 1.
// useful for clipping
// If x=0.5 then only left side of texture drawn
// If y=0.5 then only posterior side of texture drawn
// If z=0.5 then only inferior side of texture drawn
begin
glColor4f(1,1,1,1);
glBegin(GL_LINE_STRIP);
//* Back side
//glNormal3f(0.0, 0.0, -1.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(0.0, y, 0.0);
drawVertex(x, y, 0.0);
drawVertex(x, 0.0, 0.0);
glEnd;
glBegin(GL_LINE_STRIP);
//* Front side
//glNormal3f(0.0, 0.0, 1.0);
drawVertex(0.0, 0.0, z);
drawVertex(x, 0.0, z);
drawVertex(x, y, z);
drawVertex(0.0, y, z);
glEnd;
glBegin(GL_LINE_STRIP);
//* Top side
//glNormal3f(0.0, 1.0, 0.0);
drawVertex(0.0, y, 0.0);
drawVertex(0.0, y, z);
drawVertex(x, y, z);
drawVertex(x, y, 0.0);
glEnd;
glColor4f(0.2,0.2,0.2,0);
glBegin(GL_LINE_STRIP);
//* Bottom side
//glNormal3f(0.0, -1.0, 0.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(x, 0.0, 0.0);
drawVertex(x, 0.0, z);
drawVertex(0.0, 0.0, z);
glEnd;
glColor4f(0,1,0,0);
glBegin(GL_LINE_STRIP);
//* Left side
//glNormal3f(-1.0, 0.0, 0.0);
drawVertex(0.0, 0.0, 0.0);
drawVertex(0.0, 0.0, z);
drawVertex(0.0, y, z);
drawVertex(0.0, y, 0.0);
glEnd;
glColor4f(1,0,0,0);
glBegin(GL_LINE_STRIP);
//* Right side
//glNormal3f(1.0, 0.0, 0.0);
drawVertex(x, 0.0, 0.0);
drawVertex(x, y, 0.0);
drawVertex(x, y, z);
drawVertex(x, 0.0, z);
glEnd();
end;
(* procedure clipMat;
var
lMgl: array[0..15] of GLfloat;
begin
glGetFloatv(GL_TRANSPOSE_MODELVIEW_MATRIX, @lMgl);
clipboard.AsText:= format('m=[%g %g %g %g; %g %g %g %g; %g %g %g %g; %g %g %g %g]',[
m[0,0], m[0,1], m[0,2], m[0,3],
m[1,0], m[1,1], m[1,2], m[1,3],
m[2,0], m[2,1], m[2,2], m[2,3],
m[3,0], m[3,1], m[3,2], m[3,3]]
);
end;*)
procedure rayCastingX (var lTex: TTexture; w,h : integer; finalImage, backFaceBuffer: GLuint);
begin
glUseProgram(gRayCast.glslprogram);
//glUseProgram(0);
//glUseProgram(gRayCast.glslprogramGradient);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, finalImage, 0);
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT );
//glEnable(GL_TEXTURE_2D);
if gShader.SinglePass <> 1 then begin
glActiveTexture( GL_TEXTURE0 );
glBindTexture(GL_TEXTURE_2D, backFaceBuffer);
glUniform1i( gRayCast.backFaceLoc, 0 ); // backFaceBuffer -> texture0
glUniform1f( gRayCast.viewWidthLoc, w );
glUniform1f( gRayCast.viewHeightLoc, h );
end;
glActiveTexture( GL_TEXTURE1 );
glBindTexture(GL_TEXTURE_3D,gRayCast.gradientTexture3D);
{$IFDEF USETRANSFERTEXTURE}
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D, gRayCast.TransferTexture1D);
{$ENDIF}
glActiveTexture( GL_TEXTURE3 );
glBindTexture(GL_TEXTURE_3D,gRayCast.intensityTexture3D);
if (gShader.OverlayVolume > 0) then begin
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_3D,gRayCast.intensityOverlay3D);
if (gShader.OverlayVolume > 1) then begin
glActiveTexture(GL_TEXTURE5);
glBindTexture(GL_TEXTURE_3D,gRayCast.gradientOverlay3D);
end;
end;
glUniform1i( gRayCast.LoopsLoc,round(gRayCast.slices*2.2));
if gRayCast.ScreenCapture then
glUniform1f( gRayCast.stepSizeLoc, ComputeStepSize(10) )
else
glUniform1f( gRayCast.stepSizeLoc, ComputeStepSize(gPrefs.RayCastQuality1to10) );
glUniform1f( gRayCast.sliceSizeLoc, 1/gRayCast.slices );
glUniform1i( gRayCast.gradientVolLoc, 1 ); // gradientTexture -> texture2
{$IFDEF USETRANSFERTEXTURE}
uniform1i( 'TransferTexture',2); //used when render volumes are scalar, not RGBA{$ENDIF}
{$ENDIF}
glUniform1i( gRayCast.intensityVolLoc, 3 );
glUniform1i( gRayCast.overlayVolLoc, 4 );
glUniform1i( gRayCast.overlayGradientVolLoc, 5 );
glUniform1i( gRayCast.overlaysLoc, gOpenOverlays);
AdjustShaders(gShader);
LightUniforms;
ClipUniforms;
glUniform3f(gRayCast.clearColorLoc,gPrefs.BackColor.rgbRed/255,gPrefs.BackColor.rgbGreen/255,gPrefs.BackColor.rgbBlue/255);
if gPrefs.RayCastQuality1to10 = 10 then
glUniform3f(gRayCast.textureSizeLoc, gTexture3D.FiltDim[1], gTexture3D.FiltDim[2], gTexture3D.FiltDim[3]);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
//glMatrixMode(GL_MODELVIEW);
//glScalef(1,1,1);
drawQuads(1.0,1.0,1.0);
glDisable(GL_CULL_FACE);
glUseProgram(0);
glActiveTexture( GL_TEXTURE0 );
//glDisable(GL_TEXTURE_2D);
end;
procedure rayCasting (var lTex: TTexture);
begin
rayCastingX(lTex,gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT, gRayCast.finalImage, gRayCast.backFaceBuffer);
end;
procedure MakeCube(sz: single);
var
sz2: single;
begin
sz2 := sz;
glColor4f(0.1,0.1,0.1,1);
glBegin(GL_QUADS);
//* Bottom side
glVertex3f(-sz, -sz, -sz2);
glVertex3f(-sz, sz, -sz2);
glVertex3f(sz, sz, -sz2);
glVertex3f(sz, -sz, -sz2);
glEnd;
glColor4f(0.8,0.8,0.8,1);
glBegin(GL_QUADS);
//* Top side
glVertex3f(-sz, -sz, sz2);
glVertex3f(sz, -sz, sz2);
glVertex3f(sz, sz, sz2);
glVertex3f(-sz, sz, sz2);
glEnd;
glColor4f(0,0,0.4,1);
glBegin(GL_QUADS);
//* Front side
glVertex3f(-sz, sz2, -sz);
glVertex3f(-sz, sz2, sz);
glVertex3f(sz, sz2, sz);
glVertex3f(sz, sz2, -sz);
glEnd;
glColor4f(0.2,0,0.2,1);
glBegin(GL_QUADS);
//* Back side
glVertex3f(-sz, -sz2, -sz);
glVertex3f(sz, -sz2, -sz);
glVertex3f(sz, -sz2, sz);
glVertex3f(-sz, -sz2, sz);
glEnd;
glColor4f(0.6,0,0,1);
glBegin(GL_QUADS);
//* Left side
glVertex3f(-sz2, -sz, -sz);
glVertex3f(-sz2, -sz, sz);
glVertex3f(-sz2, sz, sz);
glVertex3f(-sz2, sz, -sz);
glEnd;
glColor4f(0,0.6,0,1);
glBegin(GL_QUADS);
//* Right side
//glNormal3f(1.0, -sz, -sz);
glVertex3f(sz2, -sz, -sz);
glVertex3f(sz2, sz, -sz);
glVertex3f(sz2, sz, sz);
glVertex3f(sz2, -sz, sz);
glEnd();
end;
(*procedure DrawCube (lScrnWid, lScrnHt, zoomOffsetX, zoomOffsetY: integer);
var
mn: integer;
sz: single;
begin
mn := lScrnWid;
if mn > lScrnHt then mn := lScrnHt;
if mn < 10 then exit;
sz := mn * 0.03;
// glEnable(GL_CULL_FACE); // <- required for Cocoa
glDisable(GL_DEPTH_TEST);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glOrtho (0, gRayCast.WINDOW_WIDTH,0, gRayCast.WINDOW_Height,-10*sz,10*sz);
glEnable(GL_DEPTH_TEST);
glDisable (GL_LIGHTING);
glDisable (GL_BLEND);
glTranslatef(1.8*sz,1.8*sz,0);
glTranslatef(zoomOffsetX, zoomOffsetY, 0);
glRotatef(90-gRayCast.Elevation,-1,0,0);
glRotatef(gRayCast.Azimuth,0,0,1);
MakeCube(sz);
//glDisable(GL_DEPTH_TEST);
//glDisable(GL_CULL_FACE); // <- required for Cocoa
end; *)
procedure DisplayGLz(var lTex: TTexture; zoom, zoomOffsetX, zoomOffsetY: integer; framebuff: GLUint; isTiled: boolean);
var
ClrbarSizeFracX: single;
begin
//if (gPrefs.SliceView = 5) and (length(gRayCast.MosaicString) < 1) then exit; //we need to draw something, otherwise swapbuffer crashes
gRayCast.drawFrameBuffer := framebuff;
if (gPrefs.SliceView <> 5) then gRayCast.MosaicString := '';
doShaderBlurSobel(lTex);
disableRenderBuffers(framebuff);
glClearColor(gPrefs.BackColor.rgbRed/255,gPrefs.BackColor.rgbGreen/255,gPrefs.BackColor.rgbBlue/255, 0);
resizeGL(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT,zoom, zoomOffsetX, zoomOffsetY);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, gRayCast.renderBuffer);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT); //required by VirtualBox
{$IFDEF ENABLEMOSAICS}
if length(gRayCast.MosaicString)> 0 then begin //draw mosaics
GLForm1.ClearText(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT );
glDisable(GL_CULL_FACE); //<-this is important, otherwise nodes and quads not filled
ClrbarSizeFracX := MosaicGL(gRayCast.MosaicString,lTex);
//if gPrefs.Colorbar and (gPrefs.SliceView <> 5) then
// DrawCLUT( gPrefs.ColorBarPos,0.01, gPrefs);//, gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoomOffsetX, zoomOffsetY);
//if gPrefs.Colorbar then
// GLForm1.drawClrbar(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY);
//GLForm1.DrawText(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY);
glEnable (GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
GLForm1.DrawText(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY);
reshapeOrtho(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
if gPrefs.Colorbar then begin
GLForm1.drawClrbar(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY, ClrbarSizeFracX);
end;
end else {$ENDIF} if gPrefs.SliceView > 0 then begin //draw 2D orthogonal slices
GLForm1.ClearText(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT );
glDisable(GL_CULL_FACE); //<-this is important, otherwise nodes and quads not filled
DrawOrtho(lTex);
glEnable (GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
GLForm1.DrawText(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY);
reshapeOrtho(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
if gPrefs.Colorbar then
GLForm1.drawClrbar(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY,0);
end else begin //else draw 3D rendering
enableRenderbuffers();
glTranslatef(0,0,-gRayCast.Distance);
glRotatef(90-gRayCast.Elevation,-1,0,0);
glRotatef(gRayCast.Azimuth,0,0,1);
glTranslatef(-lTex.Scale[1]/2,-lTex.Scale[2]/2,-lTex.Scale[3]/2);
glMatrixMode(GL_MODELVIEW);
glScalef(lTex.Scale[1],lTex.Scale[2],lTex.Scale[3]);
if gShader.SinglePass <> 1 then
renderBackFace(lTex, gRayCast.backFaceBuffer);
rayCasting(lTex);
disableRenderBuffers(framebuff);
renderBufferToScreen();
if gPrefs.SliceDetailsCubeAndText then
GLForm1.drawCube(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom,zoom, zoomOffsetX, zoomOffsetY);
if gPrefs.Colorbar then
GLForm1.drawClrbar(gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoom, zoomOffsetX, zoomOffsetY,0);
resizeGL(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT,zoom, zoomOffsetX, zoomOffsetY);
end;
if gPrefs.ColorEditor then
DrawNodes(gRayCast.WINDOW_HEIGHT,gRayCast.WINDOW_WIDTH, lTex, gPrefs);
//if gPrefs.Colorbar (*and (gPrefs.SliceView <> 5)*) then
// GLForm1.drawClrbar(gRayCast.WINDOW_WIDTH*zoom, zoom, gRayCast.WINDOW_HEIGHT*zoom, zoomOffsetX, zoomOffsetY);
//DrawCLUT( gPrefs.ColorBarPos,0.01, gPrefs);//, gRayCast.WINDOW_WIDTH*zoom, gRayCast.WINDOW_HEIGHT*zoom, zoomOffsetX, zoomOffsetY);
{$IFDEF ENABLEWATERMARK}
if gWatermark.filename <> '' then
LoadWatermark(gWatermark);
if gWatermark.Ht > 0 then
DrawWatermark(gWatermark.X,gWatermark.Y,gWatermark.Wid,gWatermark.Ht,gWatermark);
{$ENDIF}
glDisable (GL_BLEND); //just in case one of the previous functions forgot...
glFlush;//<-this would pause until all jobs are SUBMITTED
//glFinish;//<-this would pause until all jobs finished: generally a bad idea!
//next, you will need to execute SwapBuffers
end;
procedure DisplayGL(var lTex: TTexture);
begin
DisplayGLz(lTex,1,0,0,0, false);
end;
(*procedure resizeGLX(w,h, zoom, zoomOffsetX, zoomOffsetY: integer);
var
whratio,scale: single;
begin
if (h = 0) then
h := 1;
glViewport(zoomOffsetX, zoomOffsetY, w*zoom, h*zoom);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
//if gRayCast.Distance = 0 then
scale := 1;
//else
// scale := 1/abs(kDefaultDistance/(gRayCast.Distance+1.0));
//whratio := w/h;
whratio := 1;
// glOrtho(whratio*-0.5*scale,whratio*0.5*scale,-0.5*scale,0.5*scale, 0.01, kMaxDistance);
glOrtho(-0.5,0.5,-0.5,0.5, 0.01, kMaxDistance);
// glOrtho(0, w, 0, h,0.01, kMaxDistance);
//glOrtho(0, gRayCast.WINDOW_WIDTH, 0, gRayCast.WINDOW_HEIGHT,-1,1);//<- same effect as previous line
glMatrixMode(GL_MODELVIEW);//?
end; *)
(*procedure drawQuad(lX,lY,lW,lH: single);
begin
glDisable(GL_DEPTH_TEST);
glBegin(GL_QUADS);
glTexCoord2f(0,0);
glVertex2f(lX,lY);
glTexCoord2f(1,0);
glVertex2f(lX+lW,lY);
glTexCoord2f(1, 1);
glVertex2f(lX+lW, lY+lH);
glTexCoord2f(0, 1);
glVertex2f(lX, lY+lH);
glEnd();
glEnable(GL_DEPTH_TEST);
end;
procedure reshapeOrthoX(w,h: integer);
begin
if (h = 0) then h := 1;
glViewport(0, 0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
{$IFDEF DGL}
gluOrtho2D(0, 1, 0, 1.0);
//glOrtho2D(0, gRayCast.WINDOW_WIDTH, 0, gRayCast.WINDOW_HEIGHT,-1,1);
{$ELSE}
//glOrtho(0, gRayCast.WINDOW_WIDTH, 0, gRayCast.WINDOW_HEIGHT,-1,1);
glOrtho (0, 1,0, 1, -1, 1); //https://www.opengl.org/sdk/docs/man2/xhtml/gluOrtho2D.xml
{$ENDIF}
glMatrixMode(GL_MODELVIEW);//?
end; *)
(*procedure renderBufferToScreenX(lX,lY,lW,lH: single);
begin
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,gRayCast.finalImage);
if true then begin
reshapeOrthoX(gRayCast.WINDOW_WIDTH, gRayCast.WINDOW_HEIGHT);
drawQuad(lX,lY,1,1);
end else begin
glViewport(0, 0,gRayCast.WINDOW_WIDTH,gRayCast.WINDOW_HEIGHT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, gRayCast.WINDOW_WIDTH, 0, gRayCast.WINDOW_HEIGHT,-1,1);
glMatrixMode(GL_MODELVIEW);//?
drawQuad(lX,lY,lW,lh);
end;
//glOrtho(0, gRayCast.WINDOW_WIDTH, 0, gRayCast.WINDOW_HEIGHT,-1,1);
glDisable(GL_TEXTURE_2D);
end;*)
(*Type
TFrameBuffer = record
backTex, finalTex, renderBuf, depthBuf,frameBuf, tex: GLUint; //we need depth buffer for 2D cube
w, h: integer;
end;
procedure initFrame (var f : TFrameBuffer);
begin