void draw()
{
Matrix4 view;
Matrix4 projection;
parg_zcam_matrices(&projection, &view);
Matrix4 model = M4MakeIdentity();
Matrix4 modelview = M4Mul(view, model);
Matrix4 mvp = M4Mul(projection, modelview);
parg_draw_clear();
parg_shader_bind(P_SIMPLE);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(trimesh), A_POSITION, 2, PARG_FLOAT, 0, 0);
parg_draw_triangles(0, parg_mesh_ntriangles(trimesh));
}
void draw()
{
Matrix4 view;
Matrix4 projection;
parg_zcam_matrices(&projection, &view);
Matrix4 model = M4MakeIdentity();
Matrix4 modelview = M4Mul(view, model);
Matrix4 mvp = M4Mul(projection, modelview);
parg_draw_clear();
parg_shader_bind(P_SIMPLE);
parg_texture_bind(palmstexture, 0);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(rectmesh), A_POSITION, 2, PARG_FLOAT, 0, 0);
parg_varray_enable(parg_mesh_uv(rectmesh), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_draw_one_quad();
}
void PezUpdate(unsigned int elapsedMicroseconds)
{
const float RadiansPerMicrosecond = 0.0000005f;
static float Theta = 0;
Theta += elapsedMicroseconds * RadiansPerMicrosecond;
Vector3 offset = V3MakeFromElems(0, 0, 0);
Matrix4 model = M4MakeRotationZ(Theta);
model = M4Mul(M4MakeTranslation(offset), model);
model = M4Mul(model, M4MakeTranslation(V3Neg(offset)));
Point3 eyePosition = P3MakeFromElems(0, 10, 0);
Point3 targetPosition = P3MakeFromElems(0, 0, 0);
Vector3 upVector = V3MakeFromElems(0, 0, 1);
Matrix4 view = M4MakeLookAt(eyePosition, targetPosition, upVector);
ModelviewMatrix = M4Mul(view, model);
}
void SetUniforms()
{
glUniformMatrix4fv(u("ViewMatrix"), 1, 0, pf(Scene.ViewMatrix));
glUniformMatrix4fv(u("Projection"), 1, 0, pf(Scene.Projection));
Matrix4 spinMatrix = M4MakeRotationY(Scene.Theta);
Matrix4 scaleMatrix = M4MakeScale(V3MakeFromScalar(2.0f));
Matrix4 modelMatrix = M4Mul(scaleMatrix, spinMatrix);
Matrix4 modelview = M4Mul(Scene.ViewMatrix, modelMatrix);
Matrix3 normalMatrix = M4GetUpper3x3(modelview);
glUniformMatrix4fv(u("ModelMatrix"), 1, 0, pf(modelMatrix));
glUniformMatrix4fv(u("Modelview"), 1, 0, pf(modelview));
glUniformMatrix3fv(u("NormalMatrix"), 1, 0, pf(normalMatrix));
glUniform1f(u("YScale"), YScale);
glUniform1f(u("YOffset"), YOffset);
glUniform4f(u("Color"), 1, 1, 1, 1);
glUniform1f(u("TessLevelInner"), TessLevel);
glUniform1f(u("TessLevelOuter"), TessLevel);
}
void PezUpdate(float seconds)
{
const float RadiansPerSecond = 0.5f;
Globals.Theta += seconds * RadiansPerSecond;
Globals.Time += seconds;
// Create the model-view matrix:
Globals.ModelMatrix = M4MakeRotationZYX((Vector3){Globals.Theta, Globals.Theta, Globals.Theta});
Point3 eye = {0, 0, -80};
Point3 target = {0, 0, 0};
Vector3 up = {0, 1, 0};
Globals.ViewMatrix = M4MakeLookAt(eye, target, up);
Globals.Modelview = M4Mul(Globals.ViewMatrix, Globals.ModelMatrix);
Globals.NormalMatrix = M4GetUpper3x3(Globals.Modelview);
}
void PezUpdate(float seconds)
{
const float RadiansPerSecond = 0.5f;
Globals.Theta += seconds * RadiansPerSecond;
// Create the model-view matrix:
Globals.Transforms.Model = M4MakeRotationY(Globals.Theta);
Point3 eye = {0, 0, 4};
Point3 target = {0, 0, 0};
Vector3 up = {0, 1, 0};
Globals.Transforms.View = M4MakeLookAt(eye, target, up);
Globals.Transforms.Modelview = M4Mul(Globals.Transforms.View, Globals.Transforms.Model);
Globals.Transforms.Normal = M4GetUpper3x3(Globals.Transforms.Modelview);
for (int i = 0; i < 9; ++i) {
Globals.Transforms.PackedNormal[i] = M3GetElem(Globals.Transforms.Normal, i/3, i%3);
}
}
void draw()
{
Matrix4 modelview = view;
Matrix4 mvp = M4Mul(projection, view);
// Draw the background.
parg_draw_clear();
parg_shader_bind(P_TEXTURE);
parg_texture_bind(abstract, 0);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(backdrop), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_enable(parg_mesh_uv(backdrop), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(backdrop));
parg_draw_triangles_u16(0, parg_mesh_ntriangles(backdrop));
parg_varray_disable(A_TEXCOORD);
// Prep for the scene.
modelview = M4Mul(view, model);
mvp = M4Mul(projection, modelview);
parg_texture_bind(kleintex, 0);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(kleingeo), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_enable(parg_mesh_uv(kleingeo), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(kleingeo));
// Draw each chart of the Klein bottle, skipping the podium disk.
int start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i != PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
// Draw it again for the reflection.
parg_framebuffer_pushfbo(reflection, 0);
parg_draw_clear();
Matrix4 invert = M4MakeScale((Vector3){1, -1, 1});
parg_state_cullfaces(0);
Matrix4 flipped = M4Mul(model, invert);
mvp = M4Mul(projection, M4Mul(view, flipped));
parg_uniform_matrix4f(U_MVP, &mvp);
start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i != PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
mvp = M4Mul(projection, modelview);
parg_state_cullfaces(1);
parg_framebuffer_popfbo();
// Draw the podium.
parg_shader_bind(P_PODIUM);
parg_texture_bind(rust, 1);
parg_framebuffer_bindtex(reflection, 2);
parg_uniform1i(U_RUST, 1);
parg_uniform1i(U_REFLECTION, 2);
parg_uniform2f(U_RESOLUTION, resolution, resolution);
parg_uniform_matrix4f(U_MVP, &mvp);
start = 0;
for (int i = 0; i < NCHARTS; i++) {
if (i == PODIUM_CHART) {
parg_draw_triangles_u16(start, CHARTS[i]);
}
start += CHARTS[i];
}
parg_varray_disable(A_TEXCOORD);
// Draw the walls of the cylinder.
#if CYLINDER
parg_shader_bind(P_CYLINDER);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_varray_enable(
parg_mesh_coord(cylinder), A_POSITION, 3, PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(cylinder));
parg_draw_triangles_u16(0, parg_mesh_ntriangles(cylinder));
#endif
// Draw the logo billboard.
parg_state_blending(1);
parg_state_depthtest(0);
parg_shader_bind(P_LOGO);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_texture_bind(logo, 0);
parg_varray_enable(
parg_mesh_coord(billboard), A_POSITION, 2, PARG_FLOAT, 0, 0);
parg_varray_enable(
parg_mesh_coord(billboard), A_TEXCOORD, 2, PARG_FLOAT, 0, 0);
parg_draw_one_quad();
parg_varray_disable(A_TEXCOORD);
parg_state_blending(0);
parg_state_depthtest(1);
}
void draw()
{
int mesh = 0, multi = 0, meshcolor = 0;
switch (state) {
case STATE_GRAY_SOURCE:
parg_shader_bind(P_GRAY);
parg_texture_bind(graytex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_COLOR_IH:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_COLOR_DHSCSI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_MULTI_RGBA:
case STATE_MULTI_RGB:
case STATE_MULTI_DIAGRAM:
meshcolor = mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.25);
break;
case STATE_COLOR_DEFAULT:
case STATE_GRAY_DEFAULT:
case STATE_GRAY_SIMPLIFY:
case STATE_GRAY_INVERT:
case STATE_GRAY_HEIGHTS:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_MULTI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_GRAY_DUAL:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_DHS:
case STATE_GRAY_DHSC:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.5);
break;
case STATE_COLOR_SOURCE:
parg_texture_bind(colortex, 0);
parg_shader_bind(P_COLOR);
parg_uniform1f(U_ZSCALE, 1);
break;
default:
break;
}
if (mesh) {
for (int i = 0; i < sizeof(trimesh) / sizeof(trimesh[0]); i++) {
parg_mesh_free(trimesh[i]);
}
memset(trimesh, 0, sizeof(trimesh));
create_mesh();
}
Matrix4 model;
if (mesh) {
model = M4MakeScale(V3MakeFromElems(20, 20, 10));
model = M4Mul(M4MakeTranslation(V3MakeFromElems(-10, -10, 0)), model);
} else {
model = M4MakeIdentity();
}
Matrix4 modelview = M4Mul(view, model);
Matrix4 mvp = M4Mul(projection, modelview);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_draw_clear();
if (mesh) {
Vector4 colors[3];
colors[0] = (Vector4){0, 0.6, 0.9, 1};
colors[1] = (Vector4){0, 0.9, 0.6, 1};
colors[2] = (Vector4){0.9, 0.6, 0, 1};
Vector4 black = {0, 0, 0, 1.0};
for (int imesh = 0; imesh < nmeshes; imesh++) {
parg_varray_enable(parg_mesh_coord(trimesh[imesh]), A_POSITION, 3,
PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(trimesh[imesh]));
if (meshcolor) {
unsigned int b = meshcolors[imesh] & 0xff;
unsigned int g = (meshcolors[imesh] >> 8) & 0xff;
unsigned int r = (meshcolors[imesh] >> 16) & 0xff;
unsigned int a = (meshcolors[imesh] >> 24) & 0xff;
Vector4 color;
color.x = r / 255.0f;
color.y = g / 255.0f;
color.z = b / 255.0f;
color.w = a / 255.0f;
parg_uniform4f(U_COLOR, &color);
} else {
parg_uniform4f(U_COLOR, &colors[imesh]);
}
parg_draw_triangles_u16(0, parg_mesh_ntriangles(trimesh[imesh]));
parg_uniform4f(U_COLOR, &black);
parg_draw_wireframe_triangles_u16(
0, parg_mesh_ntriangles(trimesh[imesh]));
}
} else {
void PezRender()
{
#define Instances 7
Matrix4 Model[Instances];
Model[0] = M4MakeRotationY(Globals.Theta);
Model[1] = M4Mul(M4Mul(
M4MakeTranslation((Vector3){0, 0, 0.6}),
M4MakeScale(V3MakeFromScalar(0.25))),
M4MakeRotationX(Pi/2)
);
Model[2] = Model[3] = Model[4] = Model[1];
Model[1] = M4Mul(M4MakeRotationY(Globals.Theta), Model[1]);
Model[2] = M4Mul(M4MakeRotationY(Globals.Theta + Pi/2), Model[2]);
Model[3] = M4Mul(M4MakeRotationY(Globals.Theta - Pi/2), Model[3]);
Model[4] = M4Mul(M4MakeRotationY(Globals.Theta + Pi), Model[4]);
Model[5] = M4Mul(M4Mul(
M4MakeScale(V3MakeFromScalar(0.5)),
M4MakeTranslation((Vector3){0, 1.25, 0})),
M4MakeRotationY(-Globals.Theta)
);
Model[6] = M4Mul(M4Mul(
M4MakeScale(V3MakeFromScalar(0.5)),
M4MakeTranslation((Vector3){0, -1.25, 0})),
M4MakeRotationY(-Globals.Theta)
);
Vector3 LightPosition = {0.5, 0.25, 1.0}; // world space
Vector3 EyePosition = {0, 0, 1}; // world space
Matrix4 MVP[Instances];
Vector3 Lhat[Instances];
Vector3 Hhat[Instances];
for (int i = 0; i < Instances; i++) {
Matrix4 mv = M4Mul(Globals.View, Model[i]);
MVP[i] = M4Mul(Globals.Projection, mv);
Matrix3 m = M3Transpose(M4GetUpper3x3(Model[i]));
Lhat[i] = M3MulV3(m, V3Normalize(LightPosition)); // object space
Vector3 Eye = M3MulV3(m, V3Normalize(EyePosition)); // object space
Hhat[i] = V3Normalize(V3Add(Lhat[i], Eye));
}
int instanceCount = Instances;
MeshPod* mesh = &Globals.Cylinder;
glBindFramebuffer(GL_FRAMEBUFFER, Globals.FboHandle);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glUseProgram(Globals.LitProgram);
glUniform3f(u("SpecularMaterial"), 0.4, 0.4, 0.4);
glUniform4f(u("FrontMaterial"), 0, 0, 1, 1);
glUniform4f(u("BackMaterial"), 0.5, 0.5, 0, 1);
glUniform3fv(u("Hhat"), Instances, &Hhat[0].x);
glUniform3fv(u("Lhat"), Instances, &Lhat[0].x);
glUniformMatrix4fv(u("ModelviewProjection"), Instances, 0, (float*) &MVP[0]);
glBindVertexArray(mesh->FillVao);
glDrawElementsInstanced(GL_TRIANGLES, mesh->FillIndexCount, GL_UNSIGNED_SHORT, 0, instanceCount);
glUseProgram(Globals.SimpleProgram);
glUniform4f(u("Color"), 0, 0, 0, 1);
glUniformMatrix4fv(u("ModelviewProjection"), Instances, 0, (float*) &MVP[0]);
glDepthMask(GL_FALSE);
glBindVertexArray(mesh->LineVao);
glDrawElementsInstanced(GL_LINES, mesh->LineIndexCount, GL_UNSIGNED_SHORT, 0, instanceCount);
glDepthMask(GL_TRUE);
glDisable(GL_DEPTH_TEST);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glUseProgram(Globals.QuadProgram);
glBindTexture(GL_TEXTURE_2D, Globals.FboTexture);
glBindVertexArray(Globals.Grid.FillVao);
glDrawElements(GL_TRIANGLES, Globals.Grid.FillIndexCount, GL_UNSIGNED_SHORT, 0);
if (1) {
glUseProgram(Globals.GridProgram);
glBindVertexArray(Globals.Grid.LineVao);
glDrawElements(GL_LINES, Globals.Grid.LineIndexCount, GL_UNSIGNED_SHORT, 0);
}
glBindTexture(GL_TEXTURE_2D, 0);
}
