From 20214ecc4b31a121e0176d9058dae6b43c02a4cc Mon Sep 17 00:00:00 2001 From: Sam Hocevar Date: Mon, 13 Jun 2011 19:35:33 +0000 Subject: [PATCH] debug: more complex vertex buffer test. --- src/debugquad.cpp | 86 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 60 insertions(+), 26 deletions(-) diff --git a/src/debugquad.cpp b/src/debugquad.cpp index 3a752b31..a6f11113 100644 --- a/src/debugquad.cpp +++ b/src/debugquad.cpp @@ -28,7 +28,7 @@ namespace lol * DebugQuad implementation class */ -#define NUM_SHADERS 3 +#define NUM_SHADERS 4 class DebugQuadData { @@ -71,6 +71,7 @@ void DebugQuad::TickDraw(float deltams) if (!data->initialised && !IsDestroying()) { +#if 0 glGenBuffers(3, data->buflist); static char const *vertexshader = @@ -99,7 +100,9 @@ void DebugQuad::TickDraw(float deltams) "}\n"; data->shader[0] = Shader::Create(vertexshader, fragmentshader); glGenTextures(1, data->texlist); +#endif + /* Checkerboard texture */ glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, data->texlist[0]); for (int j = 0; j < 32; j++) @@ -154,33 +157,59 @@ void DebugQuad::TickDraw(float deltams) "}"); /* Quad #6: apply texture in fragment shader */ - /* Quad #8: vertex buffer, apply texture in fragment shader */ data->shader[2] = Shader::Create( + "#version 120\n" "void main()" "{" " gl_TexCoord[0] = gl_MultiTexCoord0;" " gl_Position = gl_Vertex;" "}", + "#version 120\n" "uniform sampler2D tex;" "void main()" "{" " gl_FragColor = texture2D(tex, gl_TexCoord[0].xy * 0.25);" "}"); + /* Quad #8: vertex buffer, apply texture in fragment shader */ + data->shader[3] = Shader::Create( + "#version 120\n" + "varying vec4 color;" + "void main()" + "{" + " gl_TexCoord[0] = gl_MultiTexCoord0;" + " color = gl_Color;" + " gl_Position = gl_Vertex;" + "}", + + "#version 120\n" + "varying vec4 color;" + "uniform sampler2D tex;" + "void main()" + "{" + " vec4 tmp = texture2D(tex, gl_TexCoord[0].xy * 0.25);" + " gl_FragColor = vec4(abs(tmp.xyz - color.xyz), 1.0);" + "}"); + + data->initialised = 1; } else if (data->initialised && IsDestroying()) { +#if 0 glDeleteBuffers(3, data->buflist); +#endif Shader::Destroy(data->shader[0]); Shader::Destroy(data->shader[1]); Shader::Destroy(data->shader[2]); + Shader::Destroy(data->shader[3]); glDeleteTextures(1, data->texlist); data->initialised = 0; } +#if 0 float const st = sinf(0.0005f * data->time); float const ct = cosf(0.0005f * data->time); @@ -272,6 +301,7 @@ void DebugQuad::TickDraw(float deltams) glDisableVertexAttribArray(attr_pos); glDisableVertexAttribArray(attr_col); glDisableVertexAttribArray(attr_tex); +#endif #endif /* Reset GL states */ @@ -284,7 +314,7 @@ void DebugQuad::TickDraw(float deltams) glUseProgram(0); /* Prepare our quad coordinates */ - vec2i const layout(4, 3); + vec2i const layout(3, 3); data->step = vec2(2.0f, -2.0f) / (3 * layout + vec2i(1)); data->orig = vec2(-1.0f, 1.0f) + data->step; data->aa = data->orig; @@ -296,6 +326,11 @@ void DebugQuad::TickDraw(float deltams) float f3 = 0.5f + 0.5f * sinf(0.00072f * data->time + 4.0f); float f4 = 0.5f + 0.5f * sinf(0.00091f * data->time + 8.0f); + GLfloat const colors[] = { f1, f2, f3, f4, f2, f1, f3, f1, f4, + f3, f1, f4, f4, f3, f2, f1, f2, f3 }; + GLfloat const texcoords[] = { f1, f3, f3, f2, f2, f4, + f2, f4, f4, f1, f1, f3 }; + /* Quad #1: simple glBegin program */ glColor3f(0.8f, 0.5f, 0.2f); glBegin(GL_TRIANGLES); @@ -415,20 +450,18 @@ void DebugQuad::TickDraw(float deltams) Advance(); /* Quad #7: simple vertex buffer */ - GLfloat const v1[] = { data->aa.x, data->bb.y, 0.0f, - data->bb.x, data->bb.y, 0.0f, - data->bb.x, data->aa.y, 0.0f, - data->bb.x, data->aa.y, 0.0f, - data->aa.x, data->aa.y, 0.0f, - data->aa.x, data->bb.y, 0.0f }; - GLfloat const c1[] = { f1, f2, f3, f4, f2, f1, f3, f1, f4, - f3, f1, f4, f4, f3, f2, f1, f2, f3 }; + GLfloat const vertices1[] = { data->aa.x, data->bb.y, 0.0f, + data->bb.x, data->bb.y, 0.0f, + data->bb.x, data->aa.y, 0.0f, + data->bb.x, data->aa.y, 0.0f, + data->aa.x, data->aa.y, 0.0f, + data->aa.x, data->bb.y, 0.0f }; glEnableClientState(GL_COLOR_ARRAY); glEnableClientState(GL_VERTEX_ARRAY); - glColorPointer(3, GL_FLOAT, 0, c1); - glVertexPointer(3, GL_FLOAT, 0, v1); + glColorPointer(3, GL_FLOAT, 0, colors); + glVertexPointer(3, GL_FLOAT, 0, vertices1); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); @@ -436,28 +469,29 @@ void DebugQuad::TickDraw(float deltams) Advance(); - /* Quad #8: vertex buffer, apply texture in fragment shader */ - data->shader[2]->Bind(); - GLfloat const v2[] = { data->aa.x, data->bb.y, 0.0f, - data->bb.x, data->bb.y, 0.0f, - data->bb.x, data->aa.y, 0.0f, - data->bb.x, data->aa.y, 0.0f, - data->aa.x, data->aa.y, 0.0f, - data->aa.x, data->bb.y, 0.0f }; - GLfloat const t2[] = { f1, f3, f3, f2, f2, f4, f2, f4, f4, f1, f1, f3 }; + /* Quad #8: vertex buffer, apply texture and color in fragment shader */ + data->shader[3]->Bind(); + GLfloat const vertices2[] = { data->aa.x, data->bb.y, 0.0f, + data->bb.x, data->bb.y, 0.0f, + data->bb.x, data->aa.y, 0.0f, + data->bb.x, data->aa.y, 0.0f, + data->aa.x, data->aa.y, 0.0f, + data->aa.x, data->bb.y, 0.0f }; - glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_COLOR_ARRAY); + glEnableClientState(GL_TEXTURE_COORD_ARRAY); - glTexCoordPointer(2, GL_FLOAT, 0, t2); - glVertexPointer(3, GL_FLOAT, 0, v2); + glVertexPointer(3, GL_FLOAT, 0, vertices2); + glColorPointer(3, GL_FLOAT, 0, colors); + glTexCoordPointer(2, GL_FLOAT, 0, texcoords); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); + glDisableClientState(GL_COLOR_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY); Advance(); - } void DebugQuad::Advance()